Dynaudio Portable Speaker Air Series User Manual

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IMPORTANT SAFETY INSTRUCTIONS  
The lightning flash with an arrowhead symbol within an  
The exclamation point within an equilateral triangle is  
intended to alert the user to the presence of important  
operating and maintenance (servicing) instructions in the  
literature accompanying the product.  
equilateral triangle, is intended to alert the user to the  
presence of uninsulated “dangerous voltage” within the  
product’s enclosure that may be of sufficient magnitude to  
constitute a risk of electric shock to persons.  
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Read these instructions.  
Keep these instructions.  
Heed all warnings.  
Follow all instructions.  
Do not use this apparatus near water.  
Clean only with a dry cloth.  
Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.  
Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.  
Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A  
grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided  
plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.  
10 Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the  
apparatus.  
11 Only use attachments/accessories specified by the manufacturer.  
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Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used,  
use caution when moving the cart/apparatus combination to avoid injury from tip-over.  
13 Unplug this apparatus during lightning storms or when unused for long periods of time.  
14 Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-  
supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or  
moisture, does not operate normally, or has been dropped.  
Warning!  
To reduce the risk of fire or electrical shock, do not expose this equipment to dripping or splashing and ensure that no objects filled with liquids,  
such as vases, are placed on the equipment.  
This apparatus must be earthed.  
Use a three wire grounding type line cord like the one supplied with the product.  
Be advised that different operating voltages require the use of different types of line cord and attachment plugs.  
Check the voltage in your area and use the correct type. See table below:  
Voltage  
Line plug according to standard.  
110-125V  
220-230V  
240V  
UL817 and CSA C22.2 no 42.  
CEE 7 page VII, SR section 107-2-D1/IEC 83 page C4.  
BS 1363 of 1984. Specification for 13A fused plugs and switched and un-switched socket outlets.  
This equipment should be installed near the socket outlet and disconnection of the device should be easily accessible.  
To completely disconnect from AC mains, disconnect the power supply cord from the AC receptable.  
The mains plug of the power supply shall remain readily operable.  
Do not install in a confined space.  
Do not open the unit - risk of electric shock inside.  
Service  
There are no user-serviceable parts inside. All service must be performed by qualified personnel.  
EMC/EMI  
This equipment has been tested and found to comply with the limits for a Class B Digital device, pursuant to part 15 of the FCC rules.  
These limits are designed to provide reasonable protection against harmful interference in residential installations. This equipment  
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful inter-  
ference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.  
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on. The  
user is encouraged to try to correct the interference by one or more of the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
Caution:  
You are cautioned that any change or modifications not expressly approved in this manual could void your authority to operate this equipment.  
For the customers in Canada:  
This Class B Digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations ICES-003.  
Cet appareil numérique de la classe B respecte toutes les exigences du Réglement sur le matériel brouilleur du Canada.  
This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.  
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TABLE OF CONTENTS  
The AIR REMOTE  
Basics  
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44  
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45  
Important Safety Instructions . . . . . . . . . . . . . . .a  
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . .3  
Quick Setup Reference . . . . . . . . . . . . . . . . . . .4  
Operational Overview . . . . . . . . . . . . . . . . . . . . .6  
Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7  
The AIR SOFT  
Setting up of the AIR SOFT . . . . . . . . . . . . . . .46  
Operating AIR SOFT . . . . . . . . . . . . . . . . . . . .46  
Introduction  
This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . .14  
The Product Concept . . . . . . . . . . . . . . . . . . . .14  
Appendix  
Miscellaneous  
Miscellaneous Technical Comments . . . . . . . .51  
Reset procedure . . . . . . . . . . . . . . . . . . . . . . . .51  
Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52  
System Description  
The Master/Slave Concept . . . . . . . . . . . . . . . .14  
The Master Unit . . . . . . . . . . . . . . . . . . . . . . . .15  
The Slave & Sub Units . . . . . . . . . . . . . . . . . . .15  
Initializing Network . . . . . . . . . . . . . . . . . . . . . .15  
Remote Control . . . . . . . . . . . . . . . . . . . . . . . .15  
Common Features . . . . . . . . . . . . . . . . . . . . . .15  
Rear Panel Description . . . . . . . . . . . . . . . . . . .16  
Technical Specifications  
Technical specifications for all models . . . . . . .53  
Delay in System . . . . . . . . . . . . . . . . . . . . . . . .56  
Error messages . . . . . . . . . . . . . . . . . . . . . . . .56  
Certificate of Conformity . . . . . . . . . . . . . . . . . .57  
Preset list . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58  
Operation  
The AIR Display . . . . . . . . . . . . . . . . . . . . . . . .17  
Parameter Description . . . . . . . . . . . . . . . . . . .18  
Optimizing Your Setup  
Placing the Monitors . . . . . . . . . . . . . . . . . . . . .21  
Checking Monitor Placement . . . . . . . . . . . . . .23  
Calibrating Main Monitors . . . . . . . . . . . . . . . . .24  
X-Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25  
Placing the Subwoofer . . . . . . . . . . . . . . . . . . .26  
Checking Subwoofer Placement . . . . . . . . . . .27  
Calibrating the subwoofer  
with the Main Monitors . . . . . . . . . . . . . . . . . . .28  
Bass-management . . . . . . . . . . . . . . . . . . . . . .28  
Background Information  
Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30  
Sabines formula . . . . . . . . . . . . . . . . . . . . . . . .31  
Absorbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32  
Diffusers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32  
Standing waves  
Standing Waves . . . . . . . . . . . . . . . . . . . . . . . .33  
Room Modes . . . . . . . . . . . . . . . . . . . . . . . . . .34  
Comb Filtering . . . . . . . . . . . . . . . . . . . . . . . . .37  
Rear Wall Cancellation . . . . . . . . . . . . . . . . . . .39  
The Subwoofer . . . . . . . . . . . . . . . . . . . . . . . . .40  
Bass Management . . . . . . . . . . . . . . . . . . . . . .40  
The LFE Channel . . . . . . . . . . . . . . . . . . . . . . .41  
Delaying Monitors . . . . . . . . . . . . . . . . . . . . . . .42  
Line Up & Calibration . . . . . . . . . . . . . . . . . . . .43  
How To Measure the Sound Pressure . . . . . . .43  
TC Electronic, Sindalsvej 34, DK-8240 Risskov  
AIR  
English version  
Rev 1.61 - SW 1.60  
Prod. No. 606104919  
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QUICK SETUP REFERENCE  
This page is a quick guide on how to connect different setups. Connections must be made exactly as illustrated.  
Detailed descriptions of the setups can be found on pages 7-13.  
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QUICK SETUP REFERENCE  
Important !  
• One specific Master monitor must be set as System Controller.  
(see setup illustrations above)  
To set a Master monitor as System Controller the TC LINK button on the  
rear panel must be left out.  
• The TC LINK button on all other Master monitors must be set to In position.  
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OPERATIONAL OVERVIEW  
Parameter structure accessible via the AIR monitor set as System Controller  
Empty  
Custom  
Main Display  
“Serial No” L Front  
Volume -50.0 dB  
Stereo analog  
Stereo digital  
5.1 analog  
5.1 digital  
ENTER  
*Select Task  
No task  
L Front  
R Front  
Center  
(C) SUB  
L Sur  
R Sur  
6.1 analog  
6.1 digital  
5.3 analog  
5.3 digital  
*Select Mode  
Off  
Bass Management  
X-over Off  
X-over 50Hz  
X-over 80Hz  
X-over Ext 50Hz  
X-over Ext 80Hz  
X-over THX 80Hz  
X-over SC 120Hz  
ENTER  
5.1 digital/6 Master  
C Sur  
L SUB  
R SUB  
ENTER  
ENTER  
L Chain  
R Chain  
L Inner  
Setup Menu  
Setup  
“xxxx”  
ENTER  
R Inner  
Custom 1-4  
Set monitor  
tasks  
*Select AIR  
Master “xxxx”  
ENTER  
ENTER  
AIR BASE  
Pink Noise Off/On  
Calib  
Rel. Lev  
LFE LP  
0.0dB  
-5.0dB  
On/Off  
*Select clock  
BNC Input On  
BNC Input Off  
External clock  
BNC Sync “xxx”  
LFE Gain 0 to +14dB  
Polarity  
Phase  
0/180deg  
0-180deg  
Sensitivity A-Input  
+9dBu, +15dBu,  
+21dBu, +27dBu  
Input Sensitivity  
A-Input Gain +27dB  
ENTER  
ENTER  
AIR  
Pink Noise Off/On  
Calib  
Rel. Lev  
Position: Neutral  
0.0dB  
-5.0dB  
*Select AIR  
Master “xxxx”  
ENTER  
EXIT  
Calibrate monitor  
(press  
Wall  
ENTER)  
Corner  
Console  
C. Wall  
C. Corn  
0.0dB  
Accept to clear  
network setup  
Clear setup for  
entire network  
ENTER  
Bass  
Treble  
0.0dB  
Recall Preset  
Preset locations:  
User #1 to #15  
Factory #16 to 32  
*Select preset  
ENTER  
ENTER  
1
User  
*Select preset  
User  
Store locations are:  
Store Preset  
Utility Menu  
1
User  
#1 to #15  
Duration before  
Standby: 30min  
Powersave: 3h  
Backlight: on  
Autosave volume:  
off  
15min, 30min,1h, 1.5h, off  
1h, 1.5h, 2.5h, 3h, 5h, off  
on, auto, off  
ENTER  
ENTER  
off, on  
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SETUPS  
Stereo Setup  
This illustration shows how to connect a standard  
stereo setup.  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
• Left monitor is set as System Controller by leaving out  
the TC Link button on the rear panel.  
• Left monitor receives both Left and Right Input signal.  
• Right monitor receives audio via the TC-LINK RJ-45  
connection.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
Stereo Setup with mono Sub(s)  
This illustration shows how to connect a stereo setup  
with 1 Sub.  
• Left monitor is set as System Controller by leaving out  
the TC Link button on the rear panel.  
To set a Master  
monitor as  
System Controller  
the TC Link  
• Left monitor receives both Left and Right Input signal.  
• Right monitor and Sub receives audio via the  
TC LINK RJ-45 connections on the Left monitor.  
• With no Bass-management, no signal is sent to the Sub.  
• With Bass-management activated, Low Frequency  
information from Left and Right channels below the set  
Cross-over frequency is extracted and fed to the Sub.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
button on the rear  
panel MUST be in  
out-position.  
Stereo Setup with stereo Subs  
This illustration shows how to connect a stereo setup  
with SUBs.  
• Left monitor is set as System Controller by leaving out  
the TC Link button on the rear panel.  
To set a Master  
monitor as  
System Controller  
the TC Link  
• Left monitor receives both Left and Right Input signal.  
• Right Monitor and Subs receive audio via the TC LINK  
RJ-45 connection as illustrated.  
button on the rear  
panel MUST be in  
out-position.  
• With no Bass-management, no signal is sent to the Sub.  
• With Bass-management activated, Low Frequency  
information from Left and Right channels, below the set  
Cross-over frequency, is extracted. Low frequency  
information from the Left channel is distributed to L Sub  
and Low Frequency information from the Right channel is  
distributed to the Right Sub.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
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SETUPS  
5.1 Digital Setup  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
This illustration shows how to connect a 5.1 digital  
setup  
• Left monitor is set as System Controller by leaving out  
the TC Link button on the rear panel.  
• Left monitor receives both Left and Right Input signal.  
Right channel is fed via the TC -LINK RJ-45 connection  
from the Left to Right.  
LS monitor receives both Left and Right Surround  
channels. The RS channel is fed via the RJ-45  
connection from LS to RS.  
• Center monitor receives both Center and LFE channels.  
The LFE monitor is fed via the RJ-45 connection from  
Center to LFE.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
5.1 Analog Setup  
This illustration shows how to connect a 5.1 analog  
setup  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
• Left monitor is set as System Controller by leaving out  
the TC Link button on the rear panel.  
• Left monitor receives both Left and Right Input signal.  
Right channel is fed via the TC -LINK RJ-45 connection  
from the Left to Right.  
LS monitor receives both Left and Right Surround  
channels. The RS channel is fed via the RJ-45  
connection from LS to RS.  
• Center monitor receives both Center and LFE channels.  
The LFE monitor is fed via the RJ-45 connection from  
Center to LFE.  
• With no Bass-management active the Sub will play only  
the LFE channel.  
• With Bass-management activated Low Frequency  
information from the 5 main channels is extracted and  
distributed to the Sub where it is summed with the LFE  
channel.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
The setups will ONLY operate correctly if connected  
according to the illustrations!  
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SETUPS  
5.3 Digital Setup  
This illustration shows how to connect a 5.3 Digital  
setup  
• Center is set as System Controller by leaving out the TC  
Link button on the rear panel.  
• Left monitor receives both Left and LS signal. The LS  
monitor is fed via the TC LINK RJ-45 connection form  
Left to LS.  
• Center monitor receives both Center and LFE signal. The  
LFE monitor is fed via the TC LINK RJ-45 connection  
from Center to LFE.  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
• Right monitor receives both Right and RS signal. The RS  
monitor is fed via the TC LINK RJ-45 connection from  
Right to RS.  
• With Bass-management “off” Left and Right Subs  
receives no signal.  
• With Bass management “on”:  
- Low frequency information from Left and LS is  
extracted and fed to Left Sub.  
- Low frequency information from Right and RS is  
extracted and fed to Right Sub.  
- Low frequency information from Center is extracted,  
summed with the LFE channel and fed to Center Sub.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
5.3 Analog Setup  
This illustration shows how to connect a 5.3 Analog  
setup.  
Please see description on 5.3 Digital Setup above  
regarding Bass-management but notice how to connect the  
Analog signals:  
• Left channel to Left Input on the Left monitor.  
• Left Surround channel to Right Input on the Left monitor.  
• Center channel to the Left Input on the Center monitor.  
• LFE channel to the Right Input on the Center monitor.  
• Right channel to the Left Input on the Right monitor.  
• Right Surround channel to Right Input on the Right  
monitor.  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
The setups will ONLY operate correctly if connected  
according to the illustrations!  
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SETUPS  
6.1 Analog Setup  
This illustration shows how to connect a 6.1 Analog  
setup  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
• Left is set as System Controller by leaving out the TC  
Link button on the rear panel.  
• Left monitor receives both the Left and Right signal. The  
Right monitor is fed via the TC LINK RJ-45 connection  
form Left to Right.  
• Center monitor receives both Center and LFE signal. The  
LFE monitor is fed via the TC LINK RJ-45 connection  
from Center to LFE.  
• Left Surround monitor receives both LS and RS signal.  
The RS monitor is fed via the TC LINK RJ-45 connection  
from LS to RS.  
• The Center Surround monitor receives only Center  
Surround signal.  
• Center Chain: From software 1.10 it is possible to  
connect one or more Center Chain monitors.  
Channels must be connected as follows:  
- Left channel to Left Input on Left monitor.  
- Right channel to Right Input on Left monitor.  
- Center channel to Left Input on Center monitor.  
- LFE channel to Right Input on Center monitor.  
- Left Surround channel to Left Input on Left Surround  
monitor.  
• With Bass-management “off” only the LFE signal is fed to  
the Sub.  
• With Bass-management activated, Low Frequency  
information below the set Cross-over frequency from the  
5 main channels is extracted and distributed to the Sub  
where it is summed with the LFE channel.  
- Right Surround channel to Right Input on Left  
Surround monitor.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
5.1 Dig/6 - Master  
This is a 5.1 digital setup with Bass Management as an  
option. The setup requires one Master monitor with the  
optional Digital AES/EBU Input Card installed, four  
Slave monitors (or Masters set as Slave) and one Sub.  
• Center monitor is set as System Controller by leaving out  
the TC Link button on the rear panel.  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
• Center monitor receives all 6 channels on the three  
AES/EBU connections.  
- Center and LFE on the monitors Digital IN connection.  
- Left and Right on the I/O cards Digital IN no. 2.  
- LS and RS on the I/O cards Digital IN no. 3.  
• Right, Left, Sub, LS and RS receives signal via TC LINK  
RJ-45 connections from the Center Master monitor.  
• Clock MUST be sent on the AES connection feeding  
Center/LFE channels (or on BNC).  
• With Bass-management “off” only the LFE signal is fed to  
the Sub.  
• With Bass-management activated, Low Frequency  
information below the set Cross-over frequency from the  
5 main channels is extracted and distributed to the Sub  
where it is summed with the LFE channel.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
10  
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SETUPS  
Stereo Setup With Chains on L & R  
This illustration shows how to connect a stereo setup  
with chains on Left and Right.  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
The chained monitors are fed with the same signal as  
the front L&R monitors. This the type of setup you  
would use when you wiish to be able to alternate  
between a set of main- and nearfiels -monitors.  
• Left monitor is set as System Controller by leaving out  
the TC Link button on the rear panel.  
• Left monitor receives both Left and Right Input signal.  
• Right monitor receives audio via the TC-LINK RJ-45  
connection.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
Other “Chained” Setups  
From software 1.10 the available setups with “chain” option  
is: 5.1, 6.1 and 5.3 for analog and digital and well as 5.1/6  
master (digital only).  
The installed option card will limit the choises of setups  
presented on the speakers. If the AES/EBU option card is  
installed, the default digital Input will become Input 1 on the  
option card.  
• Left Surround monitor receives both LS and RS signal.  
The RS monitor is fed via the TC LINK RJ-45 connection  
from LS to RS.  
• Left Inner monitor receives both L Inner and R Inner  
signal. The R Inner monitor is fed via the TC LINK RJ-45  
connection from L Inner to R Inner.  
• With Bass-management activated Low Frequency  
information from the 5 main channels is extracted and  
distributed to the Sub where it is summed with the LFE  
channel. With Bass-management enabled, Low  
Frequency information is not extracted for the Left and  
Right Inner monitors.  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
Analog connections  
• Left channel to Left Input on Left monitor.  
• Right channel to Right Input on Left monitor.  
• Center channel to Left Input on Center monitor.  
• LFE channel to Right Input on Center monitor.  
• Left Surround channel to Left Input on Left Surround  
monitor.  
• Right Surround channel to Right Input on Left Surround  
monitor.  
• Left Inner channel to Left Input on Left Inner monitor.  
• Right Inner channel to Right Input on Right Inner monitor.  
7.1 Analog/Digital setup  
Digital  
• Left is set as System Controller by leaving out the TC  
Link button on the rear panel.  
• Left monitor receives both the Left and Right signal. The  
Right monitor is fed via the TC LINK RJ-45 connection  
form Left to Right.  
• Center monitor receives both Center and LFE signal. The  
LFE monitor is fed via the TC LINK RJ-45 connection  
from Center to LFE.  
It is not possible to choose a 7.1 setup in the setup  
menu; you need to choose either a 5.1 or 6.1  
setup, and set up the Left Inner and Right Inner  
speakers for ‘L Inner’ and ‘R Inner’ tasks respectively.  
11  
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SETUPS  
5.1 Digital - 192 kHz  
This is a 5.1 digital setup at 192kHz with Bass  
Management as an option. The setup requires three  
Master monitors with the optional Digital I/O card  
installed, two Slaves and one Sub.  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
• Left monitor is set as System Controller by leaving out  
the TC Link button on the rear panel.  
• - Left monitor receives Left and Right Front channels.  
- Center monitor receives Center channel and Sub.  
- Left Rear monitor receives LS and RS channels.  
• The Sub receives signal via TC LINK RJ-45 connections  
from the Center Master monitor.  
• Clock MUST be sent on the AES connection feeding  
Center/LFE channels (or on BNC).  
• With Bass-management “off” only the LFE signal is fed to  
the Sub.  
• With Bass-management activated, Low Frequency  
information below the set Cross-over frequency from the  
5 main channels is extracted and distributed to the Sub  
where it is summed with the LFE channel.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
6.1 Digital - 192 kHz  
This is a 6.1 digital setup with Bass Management as an  
option. The setup requires four Master monitors with  
the optional Digital I/O Card installed, two Slave  
monitors (or Masters set as Slave) and one Sub.  
• Left monitor is set as System Controller by leaving out  
the TC Link button on the rear panel.  
• - Left monitor receives both Left and Right Input signals.  
- Right monitor receives signal via the TC LINK cable.  
- Left Surround, receives both Left and Right surround  
signals.  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on the rear  
panel MUST be in  
out-position.  
- Right Surround, receives signal via the TC LINK cable.  
- Center receives both Center and Sub signals.  
- The Sub receives signal via the TC LINK cable.  
- Center Surround receives Center Surround channel.  
• Clock MUST be sent on the AES connection feeding  
Center/LFE channels (or on BNC).  
• With Bass-management “off” only the LFE signal is fed to  
the Sub.  
• With Bass-management activated, Low Frequency  
information below the set Cross-over frequency from the  
6 main channels is extracted and distributed to the Sub  
where it is summed with the LFE channel.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
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SETUPS  
5.3 Digital Setup  
This illustration shows how to connect a 5.3 Digital  
setup with Bass management as an option. The setup  
requires three Master monitors with the optional Digital  
AES/EBU I/O card installed, two Slave monitors (or  
Masters set as Slave) and three Subs.  
To set a Master  
monitor as  
System Controller  
the TC Link  
button on rear  
panel MUST be in  
out-position.  
• Center is set as System Controller by leaving out the TC  
Link button on the rear panel.  
• Left monitor receives both Left and Left Surround signal.  
The LS monitor is fed via the TC LINK RJ-45 connection  
from Left to LS.  
• Center monitor receives both Center and LFE signal. The  
LFE monitor is fed via the TC LINK RJ-45 connection  
from Center to LFE.  
• Right monitor receives both Right and Right Surround  
signal. The RS monitor is fed via the TC LINK RJ-45  
connection from Right to RS.  
• With Bass-management “off” Left and Right Subs  
receives no signal.  
• With Bass management “on”:  
- Low frequency information from Left and LS is  
extracted and fed to Left Sub.  
- Low frequency information from Right and RS is  
extracted and fed to Right Sub.  
- Low frequency information from Center is extracted,  
summed with the LFE channel and fed to Center Sub.  
• The Remote, AIR Soft and AIR PC-IP can be connected  
to any available TC LINK Out connection.  
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INTRODUCTION  
Having said that, many studios today are still working with  
analog signals for monitoring - therefore an Analog Input  
option is also provided.  
This Manual  
The latest manual revision is always available for  
The revision number of this manual is located at the  
bottom of page 4. Please compare to the revision  
number of the manual available for download from our  
web-site and download if newer.  
The following section is an introduction to the concept  
of the AIR systems. Detailed parameter explanations,  
setup guides and calibration info are to be found in  
later sections of this manual.  
Break in  
Your AIR monitors must be “run in” before optimal  
performance is achieved. It is essential that the monitors  
are not run at full level until after at least 24 hours of  
moderate operation. Optimal performance is achieved after  
about one week of operation at moderate levels.  
The Master/Slave Concept  
Two physically different units exist for each model.  
A Master unit able to:  
- receive digital audio on AES connections  
- receive analog audio (if an analog option card is  
installed)  
The Product Concept  
- send and receive audio and control data via the  
proprietary TC LINK connection.  
The AIR monitor systems take a giant step forward in  
near-field monitoring and Dynaudio & TC Electronic are  
proud to present these systems. The AIR series include  
switch mode amplification and power-supply and with the  
addition of DSP and CPU, new possibilities are opened for  
easy, convenient and precise central control of both audio  
and setup-info.  
Master Monitor Rear  
To set a Master Monitor as  
System Controller the TC  
LINK button on the rear  
panel must be left out.  
The networking possibilities will fit nicely into today's  
applications and can be taken far into the future studio.  
A brief overview of the new advantages with the concept:  
• System integration and networking (total recall,  
central control)  
• Flexibility/adjustment possibilities (to the room,  
personal liking etc.)  
• Extreme precision. (Precise alignment of individual  
monitors at the factory)  
• Improved audio quality (from intelligent algorithms  
and precision filters)  
• One and only one of the Master units must be setup as  
the System Controller. This is done by leaving out the TC  
LINK button on the rear panel. (see above). Setting up a  
system is done from the System Controller monitor.  
You set up, set tasks and calibrate all connected  
monitors in the entire system from the System Controller.  
• A Slave unit is able to receive and distribute audio and  
control data via the proprietary TC LINK connection.  
• Direct Digital Reference (Digital Input)  
Both AIR 6 and AIR 15 are Pro Audio rear-ported near-field  
monitors and are excellent for both stereo and surround  
setups in applications such as Music Recording/Mixing,  
Post production, Film, Broadcast, Video-editing etc.  
Slave Monitor Rear  
Extreme Precision  
The frequency response and timing of the woofer- and  
tweeter signals of the AIR systems is controlled to a level of  
precision only practically obtainable with DSP. Furthermore  
the sensitivity of each individual loudspeaker driver is  
measured in the line of production, and deviations are  
compensated in the DSP software to 0.1dB steps.  
Perfectly aligned monitors also give the so far unseen  
advantage of interchangeability. In the unlikely case of a  
monitor breakdown, a perfectly matching monitor can be  
added instantly.  
Audio signal from your studio is input to the Master  
monitors only and the signal is distributed from here to the  
connected Slave units through a proprietary Networking  
protocol. It is worth noticing that a Master monitor acts  
exactly as a Slave monitor when its TC LINK button is set  
in “IN position.”  
The networking capabilities, enables all monitors in a  
setup, no matter if it is Stereo or Surround, Digital or  
Analog to always be corresponding. This provides great  
possibilities in terms of general control of the entire system.  
As most productions do end up in a digital format these  
days the AIR series allow monitoring of the "pure" Digital  
signal. Simply feed the monitors directly with an AES/EBU  
signal.  
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INTRODUCTION  
Additional AIR Control units  
The Master Unit  
The Master unit distributes Audio and control data to the  
respective Slave units connected.  
Any additional control units, such as the optional AIR Soft  
Remote or the AIR Remote, can be connected to any free  
"Link" connector in the system. (see below)  
Control data is transmitted via the System Controller, and  
distributed to other monitors in the network.  
System Controller, Master or Slave  
To set up a Master unit to be either System Controller or  
Master/Slave the LINK switch on the rear panel must be  
set up correctly.  
Remote Control  
AIR monitor systems can be set up and controlled locally  
via the Master monitor’s user-interface via the optional  
remote control or from a PC/Mac.  
Out:  
The monitor operates as a System Controller  
In:  
AIR SOFT - Software Remote  
The monitor operates as either:  
- a regular Master with digital Inputs (analog Inputs are  
only with the optional analog I/O card installed) or  
- as a Slave unit.  
Any parameter in the System Controller including the setup  
parameters can be controlled via the “AIR SOFT”.  
Additionally, software upgrades and installation of such can  
be done via AIR SOFT.  
I/O  
Hardware Remote  
The Master unit contains AES/EBU Input connectors and  
three Link connectors carrying both audio and control data  
to connected Slave units.  
A simple remote level control, controlling the level of the  
entire setup. Control data is transmitted to the Master unit,  
and distributed from there ensuring that any monitor  
hooked up, is set identically.  
Connectors  
1* AES/EBU - XLR  
AIR PC-IP  
2* Link RJ45 connectors  
1* Link/Input RJ45 connector  
1* Word Clock BNC sync  
A software dedicated for the Advanced Installer. In addition  
to the common parameters the AIR PC-IP software offers  
Parametric EQ and various Parameter Lock functions.  
Option slot  
Two card types are currently available.  
• An analog Input module giving the option of feeding a  
Master unit with 2 analog Input signals.  
• An AES Digital Input card giving the option of sending all  
six channels in a 5.1 setup to one single Master monitor.  
From there the signal is distributed to 4 slave monitors  
and Sub via the TC LINK RJ-45 connections creating a  
fully digital 5.1 setup.  
Common Features  
- for both the Master and Slave units  
Advanced Condition Monitoring  
For both the Master and the Slave units several protection  
systems are included in the AIR monitors. This is to insure  
both short term protection against large dynamic pulse  
signals, but also to insure long term protection against  
over-heating and thus permanent damaging the drivers.  
Long term thermal protection  
The Slave & Sub Units  
Inside the amplifier module the temperature of the heat  
sink is constantly monitored so any dangerous over-  
temperature situations can be avoided - this is for  
protection of the entire electronic module. Furthermore the  
temperature of the tweeter voicecoil is calculated with  
behavioral modeling of the tweeters thermal characteristics.  
The Slave and Sub units contain one RJ45 Input connector  
and one Link connector. Via the RJ45 Input connector the  
Slave unit is supplied with audio and control data from the  
Master unit. Via the RJ45 Link connector transmission to  
additional monitors is possible.  
Initializing Network  
Beware  
When the setup is powered up for the first time, the Master  
unit scans the setup in order to determine the number of  
monitors connected. Each monitor is recognized via a  
unique serial number but can be renamed according to task.  
After the initial scanning of the setup, the Master unit will  
be re-scanning the setup every 5 seconds in order to  
determine any change.  
Power down procedure:  
• In general, use the "sleep function" (Press and hold Exit  
on System controller),  
• System will automatically go into sleep mode after  
2.5 hours.  
• If you need to switch the system off on the mains switch  
on rear panel, please make sure to turn down the global  
volume and switch Slave monitors off before Master  
monitors.  
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REAR PANEL DESCRIPTION - MASTER  
Master Unit - Analog I/O  
• System Controller/Slave switch  
Out-position :The monitor operates as a  
System Controller  
There can be only one System  
Controller in a setup.  
In -position:  
The monitor operates as either a regular  
Master or a Slave unit.  
• RJ45 Link connections for downstream Slave units  
• Option slot with analog I/O card installed. (optional)  
• AES/EBU digital Input  
• Word Clock BNC sync  
• Power Input 100-240V  
• Power On/Off - switch  
Slave/Sub  
• RJ45 Link connections for downstream Slave units  
• Power Input 100-240V  
• Power On/Off - switch  
Optional Digital I/O card  
Optional Digital I/O card  
With this card installed in the Master Monitor option slot a  
5.1 Digital/6 Master setup becomes an option.  
Three AES/EBU connections (6 channels) can then be fed  
to one Master monitor and distributed downstream.  
For further information see “Setups”.  
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THE AIR DISPLAY  
Overload Indication  
UP  
EXIT  
ENTER  
DOWN  
ENTER key  
CURSOR UP/DOWN keys  
The ENTER key has two main functions:  
To enter the menus currently displayed.  
These keys are used for navigating and adjusting  
parameter values.  
To set the displayed parameter in Edit mode.  
When a parameter can be edited via the CURSOR keys a  
“*” is set as the first character in front of the parameter.  
Overload Indication LED  
When this LED flashes the monitors built-in amp is driven  
beyond max performance. A continuos overload will  
activate the amp protection circuit and the monitor will be  
shut down. The monitor can be reactivated after a short  
period of cooling down.  
EXIT key  
The EXIT key is used to exit the current display and go to  
previous menu level.  
This situation will NOT damage the monitor in any way.  
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PARAMETER DESCRIPTION  
Basic operation in all menus  
• Use ARROW keys to select value or submenu  
• Use ENTER to enter menus or for confirmation, and to  
activate  
• Use EXIT to step to a higher level or to decline an  
operation  
• Values are marked with an “ * “ when they can be altered  
via the ARROW keys  
Main Display  
The Main Display indicates the position of the monitor  
(when set up) and the set volume for the monitor.  
A “+” indicates that this specific Master Unit has been set  
up to act as System Controller.  
Bass Management  
Bass management is possible in:  
- Standard Stereo with 1 Sub  
- Standard Stereo with 2 Subs  
- 5.1 Analog  
- 5.3 Analog  
- 6.1 Analog  
- 6.1 Digital - at 192kHz  
- 5.3 Digital  
- 5.1 Digital/6 Master  
- 5.1 Digital - at 192kHz  
Satellite monitors uses 2nd order Hi Pass filters to  
attenuate frequencies below the set Cross-over frequency.  
Subs use 4th order Low Pass filter to attenuate frequencies  
above the set Cross-over frequency.  
• Press ENTER to access the Select Mode  
Off:  
Bass Management is not activated. Only the LFE channel  
is distributed to the Sub.  
AIR PC-IP  
Via AIR PC-IP and advanced Bass Management mode is  
available. In this mode all filters (Satellite, Sub4 and Sub2)  
can be controlled to suit demanding setups.  
Cross-over frequencies:  
Menu Name  
Satellite filter  
50 Hz  
80 Hz  
Off  
Sub 2nd order  
50 Hz  
LFE = Sub  
Sub 4th order  
50 Hz  
X-Over 50 Hz  
X-Over 80 Hz  
Extension 50 Hz  
Extension 80 Hz  
THX Sim 80 Hz  
No  
No  
No  
No  
Yes  
Yes  
80Hz  
80Hz  
50 Hz  
50 Hz  
Off  
80 Hz  
80 Hz  
80 Hz  
Off  
80 Hz  
Small Cons 120 Hz * 120 Hz  
80Hz  
120 Hz  
Note that the Extension 50 and 80Hz uses no Bass Management on satellite speaker thus playing full range.  
* Small Cons - Small Consumer  
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PARAMETER DESCRIPTION  
Setup  
Setup Menu  
• Press ENTER to enter select mode. Select mode is  
indicated by “ * ”  
• Press ENTER to access sub-menus  
Set Monitor Task  
• Press ENTER to confirm choice  
For the System Controller - Master monitor to identify and  
operate all monitors in the setup, each monitor must be  
given one of the following tasks indicating function and  
position.  
Empty:  
No selection  
Custom:  
For custom configurations.  
• Press ENTER to access task options  
• Use ARROW keys to select task  
• Press ENTER to confirm selected task  
Stereo analog:  
Two monitor stereo setup with analog* Inputs selected.  
Following tasks can be given:  
Stereo Digital:  
Two monitor stereo setup with digital Inputs selected.  
- No task  
- L Front  
- R Front  
- Center  
- (C) Sub  
- L Sub  
- R Sub  
- L Sur  
- LsChain  
- RsChain  
- CsChain  
- L Inner  
5.1 Analog:  
5.1 setup with analog* Inputs selected.  
- R Inner  
- CustMast  
- CustSlaR  
- CustSlaL  
5.1 Digital  
5.1 setup with digital Inputs selected.  
- R Sur  
- C Sur  
6.1 Analog  
5.1 Setup + Center surround on a separate channel gives  
the 6.1 setup.  
6.1 Digital  
5.1 Setup + Center surround on a separate channel gives  
the 6.1 setup.  
5.3 Analog  
Analog setup with 5 monitors and 3 subs  
5.3 Digital  
Digital setup with 5 monitors and 3 subs  
* Analog Inputs are only available with an optional analog  
card installed.  
5.1 Digital/6 Master  
5.1 Setup using one Master with optional Digital I/o card  
installed, 4 slave monitors (or masters set as slave) and 1  
sub.  
External Clock  
• Press ENTER to access sub-menus  
BNC Sync On:  
The monitor attempts to lock on the Word Clock BNC.  
BNC Sync Off:  
The monitor will attempt to lock on the AES Input.  
Calibrate Monitor  
• Press ENTER  
• Select monitor to calibrate using the ARROW keys  
• Press ENTER  
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PARAMETER DESCRIPTION  
Parameters available for AIR 6 and AIR 15  
Phase:  
Pink Noise:  
Range: 0-180°  
Range: On/Off  
To time-compensate if the Sub is not placed according to  
the ITU 775 recommendations. There are individual Phase  
settings for each of the Bass Management Cross-over  
frequencies. Once set, these are stored as Global settings.  
Calibrate:  
Range: -6dB to +6dB  
Level calibration of the selected monitor.  
Clear Setup for entire network  
Rel. Lev:  
• Press ENTER and confirm with ENTER  
Range: -40dB to 0dB  
Relative preset volume for the selected monitor.  
LFE channel - note  
Please note that in general the LFE channel should be  
mixed with +10dB headroom.  
Room Position:  
Neutral  
If you are not able to boost your LFE monitor output from  
your console, +10dB gain can be added on your AIR-Base  
input. Most format encoders / decoders take the LFE boost  
into account, meaning that you should leave the AIR-Base  
LFE gain at 0dB when playing back a DTS or DOLBY  
encoded material on your AIR system. LFE gain is set at  
0dB in all factory presets, so if you need to add gain on  
your AIR-Base please adjust this parameter and store the  
new setting in a user preset location.  
Wall  
Corner  
Console  
C. Wall - Console Wall  
C. Corn - Console Corner  
Bass:  
Range: -6dB to +6dB  
Bass adjustment for the selected monitor  
Recall  
Treble:  
Range: -6dB to +6dB  
• Press ENTER and use ARROW keys to select presets  
• Press ENTER to recall/load the selected preset  
If no user-preset are stored on locations 1 to 4, presets 16  
to 19 are loaded instead.  
Treble adjustment for the selected monitor.  
Parameters of AIR-Base subwoofers  
Pink Noise:  
Range: On/Off  
Complete preset list is available in the appendix  
section.  
Calibrate:  
Range: -18dB to +6dB  
Level calibration of the selected monitor.  
Store  
• Press ENTER and select storage location using the  
ARROW keys  
Rel. Lev. - (Relative Level):  
Range: -40dB to 0dB  
Preset volume for the selected monitor relative to the  
calibrated and global volume.  
• Press ENTER again to store.  
Storage location can be 1-15.  
Parameter can be locked via the AIR PC-IP  
software. When trying to change values on a  
locked parameter the display reads “Locked”.  
LFE Low Pass  
Range: On/Off  
Brickwall Limiter on the LFE channel attenuating  
frequencies above 120Hz.  
LFE Gain  
Range: -6 to +8dB  
With this parameter you can boost the acoustic gain of the  
LFE channel.  
Polarity  
Range: 0 or 180º  
If the Subwoofer is correctly placed, setting the Phase  
Reverse parameter at 180º should result in a full Phase  
cancellation at the set Cross -over frequency. If this is not  
the case - the Delay parameter should be adjusted.  
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PLACING THE MONITORS  
This manual section is split into two. The first part is a direct guide on how to optimize your listening facilities to  
ensure optimal performance of your AIR monitor system. The second part contains In Depth explanations and  
background information of various acoustic phenomena and is referred to on several occasions in the first  
chapter. To dive into this chapter and start optimizing your setup, it is essential that you have made proper  
connections for your AIR System. Please follow the illustrations in the “setups” section on pages 7 to 13.  
Overview  
Angle  
-30  
Distance from listener  
Minimum 1 m  
Left front  
Right front  
Centre  
+30  
Minimum 1 m  
0
Same distance as L or R front 1)  
Same distance as L or R front 2)  
Same distance as L or R front 2)  
Left surround  
Right surround  
-110 +/-10  
-110 +/-10  
In general: Symmetry  
Basically it is preferred to establish a loudspeaker layout that provides an adequate and equal left/right image. The  
basis for this symmetry, meaning that the distance to the left and the right monitors is identical, and if not monitoring  
in the near field, then having identical distance to the (identical) side-walls.  
The AIR System offer tools for compensation, but symmetry should be established whenever possible.  
Not good !  
Good !  
Front monitors, left & right  
For a proper stereo monitoring the monitors should be placed at an angle of ±30º in front of the listening position. This  
goes both for a basic stereo setup and for the L&R front monitors in a 4 or 5 channel setup.  
ITU 775  
Center front monitor  
The center front loudspeaker can be placed either:  
A: in the middle and in the same distance from  
the listening position as the left and right front  
monitors or  
B: in the middle and on a straight line between  
the left and right front monitors.  
Surround monitors, left and right  
The surround monitors should be placed at an angle  
of ±110 (+/-10) and in the same distance from the  
listening position as the Left & Right front monitors.  
Read more on the following pages.  
1)  
If you want to fulfill the requirements of the standard ITU 775, you should either use the A-solution or the  
B-solution along with a Delay on the center monitor in order to achieve the same time of arrival from all monitors.  
Delay-time for each monitor can be adjusted using the AIR PC-IP Installers software.  
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PLACING THE MONITORS  
Placement of monitors and acoustics do influence monitor sound. AIR series provides powerful tools to compensate for  
different placement. Below, please find a description of the most common monitor placements and appropriate  
compensation. Using material from the calibration CD together with the AIR placement compensation settings could help  
the interaction between the AIR monitor and acoustics the studio. In general we recommended consulting an acoustics  
expert for measurement and advanced adjustment and alignment. AIR PC-IP is a PC software package for advanced  
installers which, among other things, provides comprehensive EQ and Delay possibilities for each AIR monitor. For  
installations where flush mounting is considered, make sure to consult an expert.  
Compensation tools within in the AIR System using the  
position options in the Calibration menu.  
Free standing / "Neutral"  
The monitor is placed on a stand or hung down from the  
Free Standing  
ceiling some distance away from walls and other surfaces.  
This position requires the "Neutral" setting (which is default  
in the "Calibrate monitor" menu). Try to place the monitor  
optimally with regard to reflections and standing waves.  
This should be your reference - you can always try to  
compare performance of an optimally placed freestanding  
AIR monitor ("Neutral" in calibration menu) with any other  
monitors placed in other positions (Wall, Corner, Console)  
to determine if compensation in these positions is needed.  
Wall  
Close to wall / "Wall"  
When the monitor is placed close to a wall, there is a need  
to decrease the bass response. The "Wall" setting found in  
the "Calibrate monitor" menu takes this and other things  
into account. Try to compare this setting with "Neutral" to  
determine which works better in your studio.  
If the opposite wall is parallel to the wall where the monitor  
is placed, be aware that low frequency cancellation might  
occur. Also, look out for standing waves which might occur  
Corner  
due to an uneven distribution of low frequencies.  
Corner  
Same considerations as in the "Wall" position, but in a  
corner position there is even more need for decreasing  
bass response which will be boosted acoustically.  
Try the "Corner" setting found in the Calibrate monitor  
menu and then evaluate performance comparing with a  
frees standing monitor in "Neutral" position. Use the Bass  
and Treble filters for fine adjustment.  
On the bridge / "Console"  
Placing a monitor on a meter bridge of a console result in a  
strong single reflection from the surface on the desk which  
may color the sound (comb filtering - sounds like the sound  
is modulated). In general it helps to minimize the distance /  
height between the monitor and the reflective surface.  
Although it is not possible to eliminate comb filtering totally  
using EQ, try to select the "Console" setting in the  
Calibrate monitor menu and evaluate performance in your  
studio.  
Console  
Other situations  
In the Calibrate monitor menu, you will also find different  
settings which takes combinations of the above into  
account - e.g. Console Wall, which should be used if the  
monitor is placed both close to a wall and has a console  
reflection.  
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CHECKING - THE PLACEMENT OF THE MONITORS  
Checking the placement  
When checking the placement of the monitors you first of  
all have to focus on the low frequencies. So the signals to  
be used are the low frequency sweeps as you find on the  
CD from track 31 to 39.  
Overview  
1
In the Setup menu: Select setup type (e.g. 5.1 or  
stereo) matching your application  
Check the phase (using the CD)  
Check the monitor positions (using the CD)  
Equalize the monitor (using the Bass and Treble  
parameters)  
2
3
4
Low -frequency sweeps  
The tracks 31 to 39 contains the following sweep  
sequences  
5
Go to: Calibrate monitor  
Select correction  
Track 31: 200 Hz – 20 Hz  
Track 32: 160 Hz – 20 Hz  
Track 33: 125 Hz – 20 Hz  
Track 34: 100 Hz – 20 Hz  
Track 35: 80 Hz – 20 Hz  
Track 36: 63 Hz – 20 Hz  
Track 37: 50 Hz – 20 Hz  
Track 38: 40 Hz – 20 Hz  
In the main display select Recall preset now you can  
choose from a number of possibilities depending on the  
way the monitors are positioned in the room:  
Room positions can be selected via the menu:  
Setup - Calibrate - Position  
• Neutral  
• Wall  
• Corner  
• Console  
• Console Wall  
• Console Corner  
During the sweeps you will hear short “bleebs” telling when  
the signal passes one of the ISO center frequencies. (See  
tables in appendix)  
There are two “bleebs” every time the frequency passes a  
whole octave center frequency and one “bleeb” every time  
the in-between 1/3-octave center frequencies are passed.  
Play all the tracks using only one monitor at a time.  
• Select the one that matches your case.  
• Select Volume in the main menu to leave preset menu.  
• Set the volume: -10 dB  
Test signals on CD. With the AIR monitors you received  
a CD containing a lot of useful test signals to be used for  
setting up of the monitors.  
Evaluation  
In the listening position you should hear the signal smooth  
and even throughout all frequency sweeps (bearing in mind  
that the frequency response of the ear is not flat).  
Phase checking  
First procedure to be carried out is phase checking.  
A number of signals both for two-channel stereo and for  
multi channel reproduction are provided with the CD.  
If you have a sound level meter this should be set to “LIN”  
with no frequency weighting. If the meter does not have a  
LIN position you can use the C-weighting, though the  
response is attenuated approximately 3 dB at 31.5 Hz and  
approximately 6 dB at 20 Hz.  
Two channel stereo:  
Use track 45-49. L/R signals are presented in phase and  
subsequently out of phase.  
Multichannel:  
Use the tracks 45-64 which contains DTS encoded signals  
pairwise comparable: L/R, L/C, L/LS, R/RS. If you do not  
have a DTS-decoder you may do the routing of the stereo  
L/R signals to other channels in your mixing console.  
In the background reading (page 43) you can find  
instructions on how alternatively to use a studio  
microphone if you do not have a sound level meter.  
If OK; continue to next chapter: Calibrating the monitor setup.  
If not OK you must find new positions for the monitors.  
Checking by ear when listening to the signals:  
In phase:  
You will hear more bass and the sound coming from a fixed  
point between the monitors.  
You have to define at what frequency the response  
becomes bad. It is a frequency just above this you should  
select as the cross-over frequency between the main  
monitors and a subwoofer. If not possible to find any good  
positions for the main monitors or for the subwoofer you  
should consider changing the acoustics of the room.  
Equalization is a very common tool for the obtaining of a  
more smooth frequency response for steady state signals  
(like the sweeps). BUT remember: equalizing can never  
repair bad acoustics.  
Out of phase:  
You will hear the sound image loose bass, the sound  
image is diffuse, and the directional information is blurred.  
If you already have a phase checking  
measurement system that can be used as well.  
23  
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CHECKING - PLACEMENT OF THE MONITORS  
Equalizing  
The AIR System menu offers a two-band shelving type  
equalizer. This can be used individually on each monitor,  
and it is implemented for a fine adjustment of the tonal  
balance.  
Range:  
±6 dB  
Adjustment step:  
Band I:  
Band II:  
0.5 dB  
100 Hz - 1 kHz  
1 kHz - 5 kHz  
Shelving  
Filter type:  
You should be very careful using this tool if you are doing  
the adjustment by ear. In a room with good acoustics  
equalizing should not be necessary at all.  
As a test signal you can use full bandwidth pink noise  
(tracks 2 or 13) on the test-CD  
In a room that you feel heavily over damped at higher  
frequencies you may wish to ad some level in the high end  
in order to get the right balance. Do it with care then.  
In a highly reflective room you may wish to attenuate the  
high frequencies.  
If you have made a good job placing the monitor in a  
proper position you should not touch the low frequency  
band.  
Notice: If you have done any adjustments using the  
equalizer, you should leave the room and come back 15  
minutes later bringing some music, that you know well.  
Play this music. Now your first impression is very important  
for the assessment of the tonal balance of the monitor  
system. Listening during a long time will make the hearing  
perform a change in the perceived timbre. This is what we  
can compare to the "white balance" of the eye. After a  
short time you are getting used to a new tonal balance or  
timbre. What sounds "cool" or "fat" then is not necessarily  
sounding right for monitoring purposes.  
Additional Equalizing can be done via the AIR PC-IP  
Installers Software.  
AIR PC-IP - Advanced Installers PC - Interface Packages  
The Installers software includes a 4 band Parametric EQ,  
for more precise EQ adjustment of each monitor.  
Next  
Go to: Calibrating the main monitor setup.  
Read more in the Background Information chapter.  
24  
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CALIBRATING - MAIN MONITORS  
Overview  
X-CURVES  
For small rooms, defined as less than 5300 cubic feet or  
150 cubic meters, ANSI/SMPTE 222M calls for a  
modification of the X-curve with flat natural response to 2  
kHz and then a 1.5dB per octave roll off above 2 kHz.  
This curve is useful when mixing in a small room and be  
playing back in a large room.  
1
Select Setup menu from the Main menu  
- then Calibrate monitor  
2
Select each monitor and set calibration level  
using the CD  
Another variation on the curve is to begin the high end roll  
off at 4 kHz and roll off 3dB per octave instead of 1.5 per  
octave.  
Calibration procedure  
The calibration has to be made to ensure that all monitors  
produce the same sound pressure level in the listening  
position when fed with the same signal.  
The level of the input signal can be locked to a specific  
sound pressure produced by the monitors.  
X-Curve 1  
Interchannel calibration  
In the main menu:  
• Select Setup menu  
• Then select Calibrate monitor  
• Select monitor Master L front  
Now you can read the settings of this monitor.  
• Set the Calib to 0.0 dB  
• Start the CD and play track 11/23 (two channel stereo)  
or track 11 (multi channel DTS)  
The tracks contain 500 Hz – 2 kHz filtered Pink Noise.  
Now: the sound pressure level is “measured” or registered  
by ear.  
Continue to the next channel. Using the Calib adjust to set  
the same level as the first monitor. If using a multi channel  
set up continue to the next monitors.  
Acoustic level calibration  
In some parts of the audio industry the monitoring system  
has to be related to absolute acoustic levels.  
On the CD, the tracks mentioned above are recorded at  
–20 dBFS. This level correspond to different acoustic levels  
depending on the kind of business you are in:  
X-Curve 2  
Film  
Video  
Music  
83 dB(C)  
78 dB(C)  
78-93 dB(C)  
• Select the first monitor (L).  
• Play the track on the CD related to this monitor.  
• Set Calib to 0.0 dB.  
• Adjust the global volume until the desired C-weighted  
level is obtained on a sound level meter in the listening  
position.  
• Go on to the next monitor  
• Adjust Calib till the same C-weighted level is obtained  
from this monitor.  
• Continue the procedure until all monitors are calibrated.  
• Exit calibration.  
Read more on pages 38-39.  
25  
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PLACING THE SUBWOOFER  
Overview  
Placement on the floor  
Advantages  
Disadvantages  
In the corner  
Gain of bass response  
Excitation of most standing waves in the  
room, hence very uneven sound distribution  
Adjacent to wall  
Free standing  
Gain of bass response  
Excitation of several standing waves in the  
room, hence very uneven sound distribution  
Position can be optimized with  
regard to standing waves  
It may take up space on the floor  
Floor standing  
The subwoofer is under normal conditions always placed directly on the floor. This is taken into account in the basic design  
and the basic settings of the AIR system.  
Placement in the corner  
This is a π/2 radiation, which yields a gain of 18 dB in the frequency range  
where the monitor is considered to be omni-directional.  
Most standing waves have their maximum in the corners of the room.  
Especially if the room has a cubic or shoebox shape (the room having all  
walls in parallel). the placement of the subwoofer in the corner may cause  
uneven sound distribution of the bass.  
The corner position is normally only preferred if all opposite surfaces in the  
room are not in parallel.  
Adjacent to a wall  
This is a π radiation, which yield a gain of 12 dB in the frequency range  
where the monitor is considered to be omni-directional.  
This position adjacent to a wall is commonly used, and it can be OK, but it  
must be noticed that the subwoofer should neither be placed in the middle or  
in the quarter points between two sidewalls if these are in parallel.  
(See pages 29-32 for the optimum positions with regard to standing waves.)  
Free standing  
This is a π radiation, which yield a gain of 6 dB in the frequency range where  
the monitor is considered to be omni-directional.  
The free standing position is highly recommended in all cubic and shoebox  
shaped rooms.  
In any case: Try to avoid placing the woofer on the half or quarter lines  
between walls.  
26  
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CHECKING - SUBWOOFER PLACEMENT  
Do not place the subwoofer on these lines quarter or  
halfway between walls.  
Evaluation  
Overview  
In the listening position you should hear the signal smooth  
and even throughout all frequency sweeps (bearing in mind  
that the frequency response of the ear is not flat).  
1
2
3
4
Set the volume at -20 dB in the main menu  
Set Bass Management to 120 Hz  
Set Bass Management to “on”  
Check the monitor position using the CD,  
tracks 30-44  
If you have a sound level meter this should be set to "LIN"  
with no frequency weighting. If the meter does not have a  
LIN position, you can use the C-weighting, though the  
response is attenuated approximately 3 dB at 31.5 Hz and  
approximately 6 dB at 20 Hz.  
5
Go to: Calibrating the subwoofer with the main  
system.  
Test signals on CD  
With the monitors you received a CD containing a lot of  
test signals. These test signals are very handy when  
setting up the monitors.  
If you do not have a sound level meter you can use a  
studio microphone instead. This is described later in this  
chapter.  
Low frequency sweeps  
Tracks 30 to 37 contains the following sweep sequences.  
If you hear the signal smooth and even throughout the  
frequency sweep you can continue to the next chapter:  
Calibrating the subwoofer with the main monitors.  
Track 31:  
Track 32:  
Track 33:  
Track 34:  
Track 35:  
Track 36:  
Track 37:  
Track 38:  
Track 39:  
200 Hz - 20 Hz  
160 Hz - 20 Hz  
125 Hz - 20 Hz  
100 Hz - 20 Hz  
80 Hz - 20 Hz  
63 Hz - 20 Hz  
50 Hz - 20 Hz  
40 Hz - 20 Hz  
32 Hz - 20 Hz  
If not OK you must find new positions for the subwoofer.  
Next  
Go to: Calibrating the subwoofer with the main monitors.  
During the sweeps you will hear short "bleebs" telling when  
the signal passes one of the ISO center frequencies. There  
are two “bleeps” every time the frequency passes a whole  
octave center frequency and one “bleeb” every time the in-  
between 1/3-octave center frequencies are passed.  
Play all the tracks using only the subwoofer.  
Mute all other monitors.  
27  
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CALIBRATING THE SUBWOOFER - with the main monitors  
Bass Management  
To Calibrate  
Bass management (sometimes called bass redirection), is  
a very important and useful tool - and it is in general an  
absolute necessity if you want to make a 5-channel setup  
in a small room! There are several reasons for this.  
1
2
3
4
5
6
7
Main menu, set volume -30 dB  
Main menu, select Bass Management: 80 Hz  
Main menu, select Setup menu: Calibrate level  
Select a task for the monitor  
Run CD low frequency sweeps; tracks 40-42  
If needed: Adjust level or crossover frequency  
Store and Exit / get ready for music!  
The bass management system is designed to subtract the  
bass contents of all main channels and reproduce this by  
the use of a subwoofer. The AIR-series provides a number  
of possible cross-over frequencies that can be determined  
by the user.  
Bass management on  
The volume is set to a reasonable level (first item in main  
menu) ex -30 dB.  
In the main menu Bass Management is selected. If no  
other preferences for a crossover frequency 80 Hz is  
selected.  
If measurements or listening to the main monitors have  
indicated uneven level distribution or uneven frequency  
response at frequencies above 80 Hz, a higher crossover  
frequency should be selected.  
Checking summing phase cancellation  
In a basic 2-channel setup or 5-channel setup (like the ITU-  
775) a sub-woofer is not specified and is not required. But  
making audio production to be played back on consumer  
equipment, one has to ensure that the mix will sound right  
in this situation. Many consumer setups containing a  
subwoofer. Hence it is very important to check what the  
summing of the bass is like. If the program material  
basically is out of phase, the bass will be cancelled when  
summed electrically. But this is not the case if the bass  
signals are reproduced by the main monitors and summed  
acoustically. A dramatic difference may exist!  
Checking the Crosspoint  
In order to confirm the selected crossover frequency, the  
CD is used. To be sure to listen to one monitor channel at  
a time one of the main channels are selected in the Setup  
menu/Calibrate monitor menu. For a start Master Left can  
be selected.  
Playback the CD track containing the low frequency  
sweeps (trax 31 to 42). Listen to the response or perform  
sound level measurement if you have a meter connected.  
Controlling standing waves  
It can be very difficult to get two monitors in the right  
position in order to prevent the excitation of the standing  
waves. But placing five monitors are even more difficult!  
Each monitor should play under the same conditions as the  
others but that is seldom the case.  
If you have a spectrum analyzer you can instead play the  
CD-tracks containing full bandwidth pink noise.  
Any uneven frequency response across the crossover  
frequency should be avoided.  
You may go back to the setting of the crossover frequency  
in the bass management setup and select another  
frequency if appropriate.  
After doing the adjustment on one channel, the other  
channels should be monitored one by on and finally all  
channels at one time.  
Three front monitors can normally be placed away from  
disturbing boundaries to prohibit the excitation of the  
standing waves. But in small rooms the rear monitors very  
often are placed in a corner or on a wall. Having the full  
frequency range reproduced in a monitor like that, there  
may occur serious problems which results in a poor low  
frequency sound distribution in the room.  
So this is another reason for using bass management.  
Simply: Only one monitor - the subwoofer - has to be  
placed in a safe position. The cross over frequency can be  
selected to a value just above the problematic frequency  
range.  
Now your system is calibrated.  
Read more in the section: Phase Adjustment on the  
following page.  
Three other parameters to consider in relation to the  
subwoofer:  
LFE Low Pass Filter  
Switches On or Off a very steep (7th order) low pass filter  
at 120 Hz. When switched On, the LFE signal is filtered for  
content above 120 Hz. Switch this filter On when a media  
encoder is not in use and switch it Off when your signal  
have been through a media encoder / decoder (Most media  
encoders - DTS, Dolby etc. - employees an anti-aliasing  
low-pass filter. Therefore in a production environment it is  
important use this filter when monitoring the LFE channel in  
order to access how the signal will sound after encoding /  
decoding (in a domestic or cinema environment).  
28  
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CALIBRATING THE SUBWOOFER - with the main monitors  
LFE Gain  
Iteration  
Range: 0 to +14dB  
The LFE channel can be boosted up to 18dB using this  
parameter.  
You may need to iterate quite a bit, maybe readjust the  
level calibration a bit too. You may even want to reconsider  
your initial choice of X-over frequency and/or monitor  
placement and start the process over again. Be patient:  
The time spent getting this right is well spent.  
Polarity  
Range: 0 or 180º  
If the Subwoofer is correctly placed, setting the Polarity  
parameter at 180º should result in a full Phase cancellation  
at the set Cross -over frequency. If this is not the case - the  
Phase parameter described below should be adjusted.  
Phase  
Range: 0 to 180º  
Phase Introduction  
The integration of the AIR-Base subwoofer with the AIR  
monitors requires on-location tuning. Apart from level  
calibration and choosing a Bass Management Crossover  
(X-over) frequency, the issue of phase alignment remains.  
For this purpose, the AIR-Base has a 0-180 degree phase  
adjustment (in 5 degree steps) and a Phase Reverse  
function. The optimum setting of these will depend on  
several factors:  
1. Room acoustics  
2. Placement of monitors and listening position  
3. Choice of X-over frequency  
4. AIR Monitor type (6 or 15)  
Phase settings are automatically saved and linked  
to the currently selected Cross-over frequency.  
Phase settings are Global settings and are  
therefore not saved with individual presets.  
Initial setting  
During calibration of the AIR-Base's DSP software, we  
have come up with default settings that we found optimal in  
our listening room. If you're placing the AIR-Base at the  
same distance from the listening position as your AIR  
Monitors, the default phase settings can be used as initial  
guidelines for setting the phase. If the distances are  
significantly different, these values are not likely to be  
optimal.  
Phase Adjustment  
Now play repeatedly a low-frequency sweep signal that  
sweeps over the X-over frequency that you have chosen.  
Tracks 31-42 on the AIR Test CD may be used. Between  
each sweep, change the Phase Reverse setting. Note the  
difference. Ideally, with the right level calibration and phase  
setting, the sound should cancel out and virtually disappear  
at or near the X-over frequency, when the Phase Reverse  
control is in one position. Tune Phase Adjust to get the  
largest possible difference between the two Phase Reverse  
settings. Then leave it in the position where no cancellation  
occurs.  
29  
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ACOUSTICS - BACKGROUND INFO  
Acoustics  
When we talk about making a room "sound right", we are  
probably dealing with room acoustics as a science  
acoustics has been around for about hundred years.  
Until then good acoustics happened by experiment, by  
experience, or simply by accident.  
Today we know a lot about the parameters that influence  
the "sound" of a room.  
Talking about the control room we know that basically this  
room should act as neutral as possible. But this is not  
always the case. Lets just take a short look on some of the  
issues, than one must be aware of.  
• One sound source, one receiver and no room  
• Only the direct sound is received.  
Good acoustics  
Here is a list of important parameters concerning good  
acoustics.  
• Proper reverberation time  
• Good sound distribution  
• Adequate sound pressure level  
• Low background noise level  
• No echo (flutter echo)  
Now lets have a look on these headlines that will be  
adequate for the most purposes concerning sound  
production.  
• One sound source, one receiver, and one reflecting  
surface.  
• The sound is received twice. (In the control room this is  
normally experienced as comb filtering, see later).  
Reverberation time  
The reverberation time is defined by the time it takes a  
sound to attenuate 60 dB after the source is stopped.  
In the real life we can experience reverb times from  
approximately 0 sec. (outdoors or in anechoic chambers) to  
something like 10-12 sec. In special reverb chambers the  
time may exceed 20 sec.  
Control rooms normally should have a reverb time around  
0.2 - 0.3 sec.  
Why do we have reverberation? The speed of the  
propagating sound wave is very slow - at least compared to  
light: approx. 1130 ft. or 340 m per sec.  
If there are no reflecting surfaces between the sound  
source and our ears, only the direct sound is heard and  
there is no reverberation.  
• One sound source and one receiver in a room.  
• The sound impulse is reflected in many surfaces.  
All the reflections are melting together and heard as  
reverberation.  
If there is a single reflecting surface we may hear the  
reflected sound in one way or another, but there is still no  
reverberation.  
If the sound is generated in a room, there are a whole lot of  
reflections. Each of these travels different paths with  
different distances on the way to the receiver. Each time  
the sound hits a surface it may loose some energy if the  
surface is absorbing.  
30  
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ACOUSTICS - BACKGROUND INFO  
One square meter (1 m2) Sabine is comparable to  
Sabines formula  
an open window with an area of one square meter:  
The sound that hits the window will disappear and  
never return. One square meter Sabine is one  
square meter with full absorption.  
Sabine is the father of modern acoustics. He found that  
reverberation time is described by a relationship between  
the room size and the amount of absorption in the room.  
Larger rooms - longer reverberation. More absorption -  
shorter reverberation.  
The basic formula sounds simple, but the problem is that  
the materials in the room will absorb differently at different  
frequencies. The absorption may range from nothing (fully  
reflective) to total absorption.  
T = 0.161 * V / A  
where  
T:  
V:  
A:  
0.161:  
Reverberation time in seconds  
Volume in m3  
Absorption in m2 Sabine  
Is a constant (to make the calculation  
right with the actual units)  
A proper reverb time should be constant with frequency,  
but this is not always the case because of the behavior of  
the materials in the room. The low frequencies are the  
most difficult to control.  
This is why the reverberation time against frequency in  
practice may look like this:  
X-studio, re v e rbe ration time in control room  
0,80  
0,70  
0,60  
0,50  
0,40  
0,30  
0,20  
0,10  
0,00  
63  
125  
250  
500  
1000  
2000  
4000  
8000  
Frequency [Hz]  
Reverberation time measured in a control room. From 250 Hz and above the curve is nicely placed  
around .3 sec. But belov the reverb time rises to .75 sec. which is too much.  
31  
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ACOUSTICS - BACKGROUND INFO  
Absorbers  
All materials in the room act acoustically even if they are  
not so-called acoustical materials. Basically we have three  
kinds of absorbers.  
Diffusers  
A diffuser provides diffuse reflection of the sound  
radiated against it. It can be a very useful solution  
in cases where reflections are disturbing the sound  
image and it is not advisory to ad further  
Membrane absorbers  
absorption. So in order to reduce flutter echoes,  
comb filtering etc., special elements can be placed  
on the "disturbing" surface. These elements must  
have dimensions comparable to the frequencies at  
which diffusion is wanted.  
This kind of absorber includes wooden floors, windows,  
doors, etc. This absorber provides absorption in the low  
end of the frequency range. The efficiency is normally not  
very high, but under normal conditions large areas are  
included in the basic room construction. Special designed  
membrane absorbers can be very effective.  
Absorbtion or diffusion ?  
Resonance absorbers  
Resonance absorbers include slit panels, perforated plate,  
Helmholtz resonators etc. These absorbers are normally  
used in the frequency midrange. The absorption is medium  
to high.  
A special technique developed by Manfred  
Schroeder is very capable in making a smooth and  
controlled diffusion. These diffusers normally  
referred to as "Schroeder Diffusers" can be found  
as prefab modules.  
Porous absorbers  
These absorbers include mineral wool, carpets, curtains,  
and so on. They can be very effective, but the thickness of  
the material has to be taken into account. Thin layers will  
only absorb the highest frequencies. (Think of a rehearsal  
room in the concrete basement where the only damping is  
a carpet on the floor: Not good at low frequencies!)  
To absorb a given frequency (and all frequencies above)  
the thickness of the absorber must be the quarter of the  
wavelength of that frequency. Or: the front of the material  
must be placed at a distance of one quarter of the  
wavelength.  
20,0  
10,0  
0,0  
Cross section of one example of the  
Schroeder Panel.  
32  
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BACKGROUND INFO - ACOUSTICS  
90º the sound will be reflected right back where it came  
Standing Waves  
from. Under certain circumstances the sound wave will  
meet itself again. For instance if the sound is reflected  
between to parallel walls. This becomes a problem, when  
the sound wave not only meets itself, but when it meets  
itself in phase. And this will happen when the distance  
between the walls is half a wavelength of the radiated  
sound wave. Or one whole wavelength - or 1½, 2, 2½ and  
so on.  
Standing waves exist in all kind of rooms. The shape of the  
room, the dimensions of the room, and the relationship  
between the dimensions of the room, are important  
parameters that will determine the frequencies around  
which the phenomenon exists as well as the distribution of  
these standing waves. But how do they occur?  
Imagine a sound source. When the sound is emitted the  
sound wave will propagate in all directions if no obstacles  
in sight. This will of course happen with the speed of  
sound. Now, if the sound source is placed inside a room  
the sound wave will hit the boundaries of the room. If the  
boundaries consist of acoustically hard (reflective)  
This phenomenon is called standing waves. Actually the  
sound wave is not standing. But it is experienced like that  
because the sound pressure maxima and minima are  
positioned in fixed places in the room.  
surfaces, the sound is reflected. If the angle of incidence is  
The sound field is  
initially radiated  
having a radial wave  
front but within a few  
reflections the sound  
field has obtained a  
plane wave front.  
33  
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ACOUSTICS - BACKGROUND INFO  
Room modes  
These special frequencies are also called room modes. Standing waves between parallel walls are called axial modes.  
Other modes exist. For instance tangential and radial modes. (See the illustration). Normally the axial modes are the  
strongest.  
Axial  
Tangential  
Radial  
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ACOUSTICS - BACKGROUND INFO  
The standing waves are characterized by having a maximum sound pressure at the boundaries of the room. Depending  
on the frequency there are one or more dips across the room.  
In a box shaped room the frequencies can be calculated as follows:  
c
nl  
l
n
w
nh  
h
f =  
(
)+ ( b )+ (  
)
2
where  
f =  
frequency in Hz  
c =  
l =  
speed of sound (approx. 340 m/s or 1130 ft/s)  
length of the room  
w =  
width of the room  
h =  
height of the room  
n =  
integer from 0 and up  
How does the standing waves influence the sound  
field?  
How to prohibit standing waves  
Parallel walls in the room should be prevented. Then the  
strongest modes are suppressed.  
The maxima of the standing waves are shown in the figure.  
The curve expresses the area of the room where the actual  
frequency is audible. At the minima the frequency is  
represented at a much lower level (sometimes -40 dB  
compared to the maximum).  
When placing the monitors it is important that as few  
modes as possible are excited. This is why the monitors  
should not be placed in a maximum of a standing wave.  
If the room has the same dimensions as length, width, and  
even height it is very problematic to obtain an even sound  
distribution.  
When monitors are built into walls you should therefore be  
concerned that the opposite wall is not parallel to the  
monitor wall.  
35  
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ACOUSTICS - BACKGROUND INFO  
At low frequencies a monitor can be considered  
as to radiate the sound energy in all directions.  
This is also called a 4 π radiation.  
When placing the monitor close to a solid  
boundary - for instance a wall - the sound  
energy that should have been radiated in the  
direction of the wall instead is radiated into the  
free half space. Hence the sound pressure is  
doubled in the half space, which yields +6 dB.  
This is also called a 2 π radiation.  
Placing the monitor against two boundaries - for  
instance in a corner limited by two walls - it is  
now radiating to the quarter space. Now the  
sound pressure is doubled twice, which yields  
+12 dB.  
This is also called a π radiation.  
Placing the monitor against three boundaries -  
for instance in a corner limited by the floor and  
two walls - the sound is radiated into 1/8 of the  
space. Compared to free space, the sound  
pressure now is increased by 18 dB.  
This is also called π/2 radiation.  
In practice the placement close to boundaries will influence the frequency  
range below 125-150 Hz.  
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ACOUSTICS - BACKGROUND INFO  
Comb Filtering  
The filtering function that arises when a signal is added to itself after having been delayed in time is called a comb filter.  
The resulting frequency response resembles a comb, hence the name.  
Two 500 Hz sinusoidal tones added. The second tone is delayed 1 ms hence the sum is zero  
Two 1 kHz sinusoidal tones added. The second tone is delayed 1 ms hence the sum is the  
double (+6 dB).  
The comb filter function is almost never intentional, but it is heard all the time in sound productions, where it can arise both  
acoustically and electrically.  
Acoustically, it typically occurs when the sound on its way from source to recipient takes in part a direct path and in part an  
indirect path via a single reflective surface. The reflection must be attenuated at least 10 dB and preferably 15 dB in order  
for it not to have an effect on the sound field at the recipient position. Electrically, the phenomenon arises when two  
microphones with a certain distance between them capture the same signal and the level from each microphone is of the  
same order of magnitude.  
37  
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ACOUSTICS - BACKGROUND INFO  
or +  
Two typical situations in which comb filters arise, either acoustically or electrically.  
In general: All digital signal processing takes time. This means in practice that comb filter effects can arise if you loop a  
signal via, for example, a compressor and combine this signal with the original.  
An example of a comb filter created by the combining of two signals with the same amplitude, but  
with a time delay between them of just 1 ms.  
It can be seen that a dip occurs due to cancellation at 500 Hz, 1.5 kHz, 2.5 kHz, etc.  
It can also be seen that the two signals add to double their value (+6 dB) at low frequencies and  
with a full wavelength's delay at 1 kHz, 2 kHz, 3 kHz etc.  
Dip frequencies  
Cancellation occurs for a comb filter at all the frequencies where the two signals are in opposite phase. This occurs when  
the time delay comprises duration of ½, 1½, 2½, etc. periods. At 1 kHz the period is 1 ms. Half of the period is 0.5 ms.  
If a time delay of precisely 0.5 ms occurs, it means that cancellation will arise, not just at 1 kHz, but also at 2 kHz, 3 kHz,  
4 kHz etc.  
38  
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ACOUSTICS - BACKGROUND INFO  
Rear wall cancellation  
When the monitor is set up at some distance in front of a wall, reflections from the wall may occur and influence the  
perceived frequency response. This could result in comb filtering if all frequencies produced by the monitor were radiated  
in all directions. But the monitors are typically only omni-directional at low frequencies.  
The result of the reflection is a single or few dips in the frequency response perceived in front of the monitor.  
This frequency is  
cancelled because of the  
oppositely phased  
reflection  
The frequency response may look like this: one cancellation at the frequency that has a wave length of four times the  
distance to the rear wall.  
The dip - or cancellation frequency - is dependent on the  
distance to the wall. If the distance is 1 m, the first dip  
frequency will occur at a frequency with a wavelength of  
4 m.  
A closer position will result in a cancellation at a higher  
frequency. This is then limited by the frequency where the  
monitor becomes directional and does rot radiate sound to  
the rear.  
l = c / f  
where  
A farther position will result in cancellation at a lower  
frequency. This is limited by the distance being so long,  
that the reflected sound is attenuated due to the long extra  
path travel.  
l = wavelength [m] (or ft.)  
c = speed of sound [m/sec] (or ft./sec.)  
f = frequency [Hz]  
Hence  
4 = 344 / f  
f = 86 Hz  
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THE SUBWOOFER - BACKGROUND INFO  
The Subwoofer  
A subwoofer is a monitor that reproduces low frequencies. The purpose is to take over from the main monitor(s) as  
frequencies approach the lower end of the frequency range. I.e. approximately below 120 Hz. When used in professional  
monitor systems it is commonly preferred to use subwoofers below approximately 80 Hz. But of course it depends on the  
performance of the main monitors.  
The low frequency contents of just one or all the main channels can be directed to one subwoofer.  
From the psycho-acoustics we know that there is no directional information in audio signals below approximately 120 Hz.  
Hence the advantage of placing the subwoofer in a position where the best distribution is achieved.  
However it is very important that the distortion in the subwoofer is reduced to an absolute minimum because distortion  
results in the production of harmonics (2, 3, 4 etc. times the frequency reproduced). Especially the third harmonic may  
dominate. Reproducing a frequency of 100 Hz can result in the generation of an audible frequency component at 300 Hz,  
which presents directional information to the human hearing system.  
Bass management  
Bass management (sometimes called bass redirection) is a very important feature - and it is in general an absolute  
necessity if you want to make a 5-channel setup in a small room! There are several reasons for this.  
The bass management system is designed to subtract the bass contents of all main channels and reproduce this by the  
use of a subwoofer. The AIR-series provides a number of possible cross-over frequencies that can be determined by the  
user.  
L
C
R
Ls  
Rs  
Σ
Sub  
Principal setup for the bass management. It can be used  
with any number of main monitors up to five.  
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THE SUBWOOFER & LFE CHANNEL - BACKGROUND INFO  
Checking summing phase cancellation  
disturbing boundaries to prohibit the excitation of the  
standing waves. But in small rooms the rear monitors very  
often are placed in a corner or on a wall. Having the full  
frequency range reproduced in a monitor like that, there  
may occur serious problems which results in a poor low  
frequency sound distribution in the room.  
In a basic 2-channel setup or 5-channel setup (like the ITU-  
775) a subwoofer is not specified and is not required. But  
making audio production to be played back on consumer  
equipment, one has to ensure that the mix will sound right  
in this situation. Many consumer setups provide a  
subwoofer. Hence it is very important to check what the  
summing of the bass is like. If the program material  
basically is out of phase, the bass will be cancelled when  
summed electrically. But this is not the case if the bass  
signals are reproduced by the main monitors and summed  
acoustically. A dramatic difference may exist!  
So this is another reason for using bass management.  
Simply: Only one monitor - the subwoofer - has to be  
placed in a safe position. The cross-over frequency can be  
selected to a value just above the problematic frequency  
range.  
Controlling standing waves  
It can be very difficult to get two monitors in the right  
position in order to prevent the excitation of the standing  
waves. But placing five monitors are even more difficult!  
Each monitor should play under the same conditions as the  
others but that is seldom the case.  
Three front monitors can normally be placed away from  
The LFE Channel  
LFE is short for Low Frequency Enhancement or Low Frequency Effects, the first being the original name but the second  
being the most correct with regard to its application.  
It is also referred to as the .1-channel, which indicates that the frequency range of this channel is only a fraction of the  
other channels in a multi channel setup. The actual frequency range is 20 Hz to 120 Hz.  
When reproduced the signal is gained by 10 dB compared to the main channels. This provides a possibility of reproducing  
occasional high-level low frequency contents without affecting the general level setting of the main channels.  
Leading signals to the LFE channel should be evaluated carefully in each case as not all transmission or reproduction  
systems may include this channel. In the music mix there is no special reason for using this channel unless you are  
recording the 1812 Overture with its canons and all that stuff.  
Cross-overs  
L
C
R
Ls  
Rs  
Sub  
Σ
Low Pass  
LFE Gain  
120 Hz  
+10 dB  
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DELAYING MONITORS  
LINE-UP & CALIBRATION  
ITU 775  
Acoustic summation of audio  
signals  
When using a 5.x setup with monitors arranged on a circle  
line (as with ITU 775) the distance from the listener to each  
of the main monitors is the same.  
The total sound level in the acoustic summation of two  
sound sources, for example of two monitor monitors,  
depends upon both the signal and the acoustics. The  
sound sources can be correlated or uncorrelated.  
In case of limited space the three front monitors can be  
arranged on a straight line. To compensate the center  
monitor being closer to the listener than the left and right  
monitor, the center signal can be delayed. To obtain  
coincident arrival of the sound from all front monitors the  
delay ranges normally between 0 and 3ms. dependent on  
the off-set needed.  
The listening position (or measurement position) can be  
either in the direct sound field or in the diffuse sound field.  
In the direct sound field, there is only one sound direction.  
This direct field exists either in the open, in a reflection-free  
room or close to the monitors. The diffuse sound field  
occurs in a room when you are so far away from the  
monitors that the portion of direct sound is less than the  
sum of all the reflections. The distance from the monitors  
where the direct sound field and the diffuse sound field are  
equally large is called the critical distance. In a control  
room, it can typically be 1-3 meters. The near field in front  
of the monitors can be regarded as a direct field.  
The speed of sound is approximately 340 m/s or 1130 ft./s.  
Approximately 1 ms. of delay will be used per 1 ft. or 30cm,  
when the monitor has to be "moved" backwards.  
Cinema setup  
In the setup for the cinema the front monitors are always  
arranged on a straight line. In this case the audience is  
placed closer to the surround monitors than the front  
monitor. In order to retain the directional information  
towards the screen the surround monitors are delayed.  
Normally the Haas-effect is taken into account. In the  
listening position the sound from the surround monitors will  
arrive about 15-20ms after the sound from the front  
monitors. The delay times involved with cinema processing  
for the surround channel is dependent on the size of the  
mixing facility, the cinema, or the home theatre/living room.  
Based on all monitors in phase, the sum of the sound  
pressure from two monitors each playing at the same level  
is 3 dB, unless the signals are correlated (they are  
identical) and the sum is measured in the direct field. In  
this situation the resulting sound pressure level is 6dB  
higher than the level of the individual monitors.  
The procedure is to calculate the difference in distance  
between front monitors and the closest surround monitor.  
Then the time difference is calculated. To this is added 15-  
20ms.  
Example: From a listening position there are 20 meters to  
the front monitors and 5 meters to the surround monitors.  
The difference is (20-5) 15 meters.  
The time is 15/340 sec, which equals .044 sec or 44ms. To  
this is added 15ms. The result is that the surround signal  
has to be delayed 59ms (or the closest possible).  
Acoustic calibration of multi-channel systems  
Calibration of the acoustic sound levels has been a  
requirement for many years when working with sound for  
film, although it has not been particularly common in other  
branches of the sound industry. However, with the  
widespread use of multi-channel formats for all forms of  
music and film presentation in the home, it has turned out  
to be beneficial to also have the acoustic levels under  
control here.  
It is important to differentiate between production for the  
cinema and production for 5.1 channel reproduction in the  
home based upon ITU 775.  
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LINE-UP & CALIBRATION - BACKGROUND INFO  
Calibration of 5.1 in an ITU-775 arrangement  
In a 5.1 system based on the ITU arrangement, all main channels have in principle the same conditions: there is one  
monitor per channel and each is placed the same distance from the listener. Internationally, there is however neither  
agreement on the level nor on the bandwidth for the noise signals that is used for acoustic calibration. Pink noise is good  
since it includes all frequencies, however it is impractical due to its "unsettled" character, which makes it difficult to  
measure at low frequencies.  
Surround Sound Forum  
Surround Sound Forum is a German interest group composed of the VDT (sound technicians), the IRT and the SRT. The  
SSF has prepared guidelines, which are generally accepted in Europe. Three test signals are specified in it, which are  
recorded at -18 dBFS (RMS).  
Measurement Signals  
Listening Level  
Signal  
(only in one channel)  
PPM level  
t <0,1 ms  
PPM level  
t <10 ms  
RMS level  
Sound pressure  
Sound pressure  
level  
level  
SLOW  
[dB]  
SLOW  
[dB(A)]  
[dB]  
-18  
-9  
[dB]  
-18  
-13  
-15  
[dB]  
-18  
-18  
-20  
1 kHz sine  
Pink noise 20 Hz-20 kHz  
Pink noise 200 Hz-20 kHz  
82  
80  
78  
78  
-11  
SMPTE  
does not influence the sound field. The microphone should  
have a flat frequency response.  
The corresponding standard from SMPTE (RP155) uses a  
standard of -20 dBFS for the reference level. Here, the C-  
weighted sound pressure level of a 500 to 2 kHz noise  
signal ends up at 83 dB.  
Place the microphone on a stand positioned at the listening  
seat. Leave the microphone pointing upwards in order to  
avoid sound pressure build-up in front of the diaphragm  
and to provide equal conditions to monitors in all directions.  
Calibration of cinema systems  
In a cinema, the listeners are sitting far from the monitors.  
Presumably, the majority sits in the diffuse sound field. In  
any event, attempts are made to establish a diffuse sound  
field from the surround monitors. Hence when the sound  
pressure is measured inside the cinema or in a mixing  
theatre it must be averaged over many different  
measurement locations. The typical basis for the majority of  
the standards is at least four locations. If there are different  
areas for the audience, for example main floor and balcony,  
measurement should be made in at least four locations in  
each. Before this measurement can be performed, the  
system's frequency response must also be in order.  
Connect the microphone to a mixing desk or a recording  
machine that has a meter built in.  
Play back a track containing pink noise on the CD you got  
with the monitors. (or use one of the other tracks as  
instructed to during setup and calibration.  
Adjust the gain in the microphone channel until the meter  
deflection reaches a point 10 dB below full scale. This is  
now your reference for your measurements. Be sure that  
you have marks on the scale that makes it possible to read  
steps of 1 or 2 dB on either side of the reference  
deflection. If 10 dB below full scale is not an adequate  
point on your meter you may choose another one, just be  
sure to have a reading on a adequate resolution.  
How to measure the sound  
pressure?  
Sound level meter or microphone  
If you use this microphone setup as described, it can be  
used for the level comparison between the individual  
monitors.  
If you are used to perform acoustic measurements you  
probably already own a sound level meter. This can be  
used for the level calibration of the monitors.  
Absolute sound pressure levels can be measured if you:  
a) are using a well calibrated microphone channel  
b) know the sensitivity of the microphone.  
If you do not have a sound level meter, there still is another  
possibility:  
Take an omni-directional microphone. (This is also called a  
pressure microphone). A studio condenser microphone is  
normally preferred but the microphone must not be too big.  
Then a simple clip microphone can be used instead as it  
43  
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THE AIR REMOTE  
Introduction  
When perfect setup and calibrations is in place, optimal performance from the AIR system monitors is achieved by  
controlling level on the monitors themselves as opposed to controlling via the mixing console. Therefore a remote control is  
a natural extension to the AIR monitor system.  
Remote Control Features  
• Instant access of three different user defined Reference Level settings.  
• Instant Preset Recall function of up to 4 presets. This way you can  
easily switch between different setups from your listening position.  
• Mute/unmute and solo function for each monitor in the setup.  
• Easy Master Level adjustment via large potentiometer.  
Ref. Level selection  
Preset Selection  
Shift key for preset  
selection 1/3 to 2/4.  
Master Volume  
Mute/Unmute/Solo for  
each channel  
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THE AIR REMOTE  
REF LEVEL 1-3 keys  
VOLUME potentiometer  
To recall Reference Level 1-3:  
Press relevant key shortly. The key LED indicates activated  
Reference Level.  
If no REFERENCE LEVEL keys are activated this control  
sets the Master volume on all channels in the system.  
If one of the REFERENCE LEVEL keys are activated,  
these will define the reference level.  
To set Reference Level 1-3:  
When REFERENCE LEVEL keys are deactivated Master  
volume returns to the level defined by the position of the  
VOLUME potentiometer.  
Set level using the large VOLUME dialer in the center of  
the remote. Press and hold relevant Reference level key  
for approx. 2 seconds. The LED will flash 3 times and then  
the new Reference level is set.  
Power up state: Potentiometer setting defines  
volume level.  
Power up state: Off (volume defined by potentiometer)  
PRESET 1/3 AND 2/4 keys  
Potentiometer LED function:  
These keys will recall presets 1/3 & 2/4 depending on the  
position of the SHIFT key.  
Power up state: Off (no presets recalled).  
As soon as the volume level is defined by the  
potentiometer setting, the LED is on. LED goes off when  
volume is set by other devices than the remote unit.  
SHIFT key  
Power up state: LED on (Potentiometer setting defines  
volume level).  
Combined with the PRESET 1/3 AND 2/4 keys (described  
above) presets 1 to 4 can be recalled.  
Preset Bank 1 is presets 1and 2. Preset bank 2 is presets  
3 and 4.  
Power up state: Preset Bank 1 selected.  
MUTE/UNMUTE - SOLO keys for the channels:  
L - C - R - Ls - SUB - Rs  
The key LEDs indicates the following states:  
LED ON  
Speaker on  
LED OFF  
Speaker Mute  
LED Flashing Speaker Solo  
Mute/Unmute  
With a single press on these keys the monitors are  
muted/unmuted.  
Solo Function  
Press and hold one of the keys to activate Solo function for  
corresponding channel.  
All other monitors can enter solo mode simultaneously.  
If a key is pressed (not held) the original mute status will  
be recalled.  
Power up state: On  
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AIR SOFT  
The AIR SOFT is a software editor for the AIR System monitors. All parameters controllable via the display locally on the  
System Controller, as well as the Reference Level features available via the AIR Remote can be controlled via the AIR Soft  
program. As your AIR monitors most likely are placed out of your immediate reach we are therefore convinced that you will  
benefit from having full control over your monitor system from your PC or Mac.  
Please find additional parameter explanations on pages 18-20 in this manual.  
Minimum requirements  
Installation procedure PC:  
• Place the Installation CD in your CD ROM drive and  
open CD contents.  
• PC running Windows 98, 2000, or XP.  
• Mac computer running OS 9.2 or higher or Mac OS X.  
• 64MB RAM  
• Press Setup  
• 800x600 24bit screen resolution  
• 1 free Serial port or USB.  
• Follow the instructions.  
Installation procedure Mac:  
• Enter the Installation CD in your CD ROM drive and  
open CD contents.  
• Run the installer.  
• Follow the instructions.  
Connect from Serial or USB port to any free TC  
LINK connection on your AIR monitors using  
ONLY the cables described on page 52.  
Serial to Cat-5 cable is supplied but if an USB  
port is used, an USB to Serial COM 9 port  
cable must be acquired.  
Navigating AIR SOFT  
Network  
Calibrate - Main Monitors  
Main Screen  
Press to enter preset list.  
Calibrate - AIR-Base  
System Setup  
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AIR SOFT  
Bass Mgt - Bass Management  
Indicates the selected Cross-over frequency for Bass  
Management.  
Main  
Tools  
When placing the cursor on top of a monitor, a few tools  
will appear:  
Press this symbol to enter calibration  
pages  
Press to solo the monitor  
Press to mute the monitor  
This is the Main screen from where all other AIR SOFT  
screens are accessed.  
The (((•))) network icon (upper left corner)  
If steady:  
The computer running the AIR SOFT is not correctly  
connected to AIR monitors. Check connections, cables and  
refer to the setup-illustrations on pages 7-13 in this manual.  
If blinking:  
The computer is correctly connected to your AIR monitor  
system.  
The (((•))) icon is also used to access the Network screen.  
Press (((•))) to access.  
VOLUME dialer  
Use the mouse on the VOLUME dialer on the middle of the  
display to adjust Volume  
REF LEV. keys  
The three keys below the dialer instantly switches between  
the 3 user-defined Reference level settings.  
To change these Ref. Levels:  
• Set dialer as desired  
• Hold cursor above Ref. Level key and select “Store” from  
the pop-up icons appearing.  
Monitor and Sub icons  
Depending on the currently selected setup (if any) satellite  
monitors and subs will be indicated by appropriate icons as  
illustrated above. Press to access specific parameters for  
the monitors.  
This symbol in the Main screen indicates that the  
selected setup expects a monitor at a certain  
position but no monitor is found. Check your  
connections and retry.  
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AIR SOFT  
Preset List  
Is accessed by clicking on the left side of the display frame.  
Network  
Accessing the Network Screen  
Press the (((•))) icon in the Main screen to access the  
Network facilities. In this screen various global network  
settings are handled.  
Autodetect  
Press to let the AIR SOFT scan your COM ports. If an AIR  
System is connected to any port it will be recognized.  
Please note that the Autodetect function is not executed  
until OK is pressed.  
Presets include  
• Preset Volume  
• Bass Management  
• LFE Low Pass  
• Parametric EQ  
• Mute status  
• X-curve setting  
• LFE Gain  
Port  
(can be adjusted using the AIR PC IP only)  
All other settings can be considered “global” and are not  
stored with presets.  
Manual select of Serial/COM port.  
Status  
Recall presets  
Select preset using your mouse and press Recall.  
Indicates the status when entering the Network screen.  
Clear Network - Clear Setup for entire network  
Select this reset procedure to clear all tasks and setup  
settings.  
Store presets  
Select User preset locations 1 to 15 and press Store.  
Edit Name  
Clear Settings - Clear Monitor Settings  
All global and local parameters in connected monitors are  
reset. Preset and network settings are not affected.  
Any User preset can be renamed.  
Set cursor in the name field and edit name using your  
keyboard.  
Locked symbol in Preset List  
Reset to Factory Settings - Reset All Settings  
A “factory” reset procedure that deletes all global and local  
parameter settings as well as preset and network settings.  
Upload Software to Monitors  
The “locked symbol” illustrated above indicates that the  
preset have been locked via the AIR PC-IP Installers  
software. A protection-locked preset cannot be unlocked via  
AIR SOFT, - only via AIR PC-IP.  
Software updates for the AIR System comes as a .syx - file.  
There are separate files for monitors and subs.  
• Save the .syx - file to a location on your harddrive prior  
to the upload procedure.  
• Press Upload Software to Monitors  
• Follow the instructions  
OK  
Press OK to exit window.  
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AIR SOFT  
During Software upload various messages could be  
displayed:  
Monitor assignment  
Task  
• Press monitor symbol to activate pink noise test-tone.  
• Then select task for the monitor now playing the noise.  
Serial number and type will be indicated.  
Example:  
In a 5.1 AIR setup you are uploading monitor software to  
the entire system. As there are separate software files for  
monitors and subs the following message should appear.  
A monitor marked with an exclamation mark  
indicates that an “unknown” monitor has been  
detected.  
“5 AIR monitors updated successfully”  
- meaning the AIR monitors are updated but no software  
has been accepted by the connected sub.  
Scan System  
Press the magnifying-glass to scan the entire  
system for connected units.  
If a monitor lost connection during transfer it will not be  
indicated or counted, but the software upload continues.  
Save Settings  
All settings except “preset settings” are saved to a back-up  
file.  
If the message: “Failed to update AIR monitors” - is  
displayed, some of the monitors have reported an error  
during software upload. This could be caused by  
communication errors. Please retry.  
Load Settings  
Press and browse to select file to load.  
Follow the instructions.  
OK  
Press to exit screen and execute Autodetect command if  
marked.  
System Setup  
Calibrate - Main Monitors  
Solo  
Pink Noise  
Mute  
Configuration  
Select your current setup.  
Via the Calibrate screen, parameters and settings for the  
Main monitors are controlled.  
The screen is accessed via the Main Screen by  
holding the cursor above the desired monitor and  
selecting the hammer icon.  
Analog Gain  
Range: 9dBu, 15dBu, 21dBu or 27dBu  
Set to match analog Input gain to match the signal fed to  
the optional Analog Input card.  
Room position  
Range: Neutral, Wall, Corner, Console, C. Wall or C. Corn  
Select according to the actual position of the monitor.  
BNC Input  
BNC Sync On:  
The monitor attempts to lock on the Word Clock BNC.  
X Curve  
Range: Off, X-Curve 1 or X-Curve-2  
Two modifications of X-222 curve are available.  
See page 25.  
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AIR SOFT  
Calibrated Level  
Level calibration of the selected monitor.  
Polarity  
Range: 0 or 180 deg.  
Mark to activate.  
Relative Level  
Preset volume for the selected monitor relative to the  
calibrated and global volume.  
Calibrated Level  
Level calibration of the selected monitor.  
Use Parametric EQ  
Relative Level  
This will be marked if the Parametric EQ is activated via  
the AIR PC-IP. Bass and Treble settings will be disabled.  
Preset volume for the selected monitor relative to the  
calibrated and global volume.  
LFE Gain  
Range: 0 to 14dB  
Bass/Treble  
Range: -6dB to +6dB  
With this parameter you can boost the gain of the LFE  
channel.  
Bass and Treble adjustment for the selected monitor.  
These handles are not available when the Parametric EQ  
is activated via AIR PC-IP.  
LFE Low Pass Filter  
Mute  
Mark to activate.  
Press to mute the selected monitor.  
Mute  
Press to mute the selected Sub.  
Solo  
Press to solo the selected monitor.  
Solo  
Press to solo the selected Sub.  
Pink Noise  
Press to generate Pink Noise in the selected  
monitor.  
Pink Noise  
Press to generate Pink Noise in the selected  
Sub.  
Calibrate - AIR-Base  
Chained monitors  
If several monitors are chained on the same task (e.g.  
LSur-LSChain) a dropdown menu will be present as  
illustrated below.  
To calibrate a chained monitor simply select from the list.  
Chained monitors will also be indicated in the Main  
screen.  
Solo  
Pink Noise  
Mute  
This symbol indicates that there are two monitors  
chained on this specific position.  
Via this Calibrate screen, parameters and settings for the  
Subwoofers are controlled.  
The screen is accessed via the Main Screen by  
holding the cursor above the desired Sub and  
selecting the hammer icon.  
Phase  
Range: 0-180°  
To time-compensate if the Sub is not placed according to  
the ITU 775 recommendations. There are individual Phase  
settings for each of the Bass Management Cross-over  
frequencies. Once set, these are stored as Global settings.  
50  
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MISCELLANEOUS  
The AIR series are unquestionably high quality  
products. This section focuses on a few technical  
issues that adds to the perception of the high standard  
of the products.  
Global Parameters  
These parameters applies for the entire System:  
Global parameters stored with presets  
• Bass Management  
• Mute Status  
High efficiency compact Switched Mode Power Supply  
(SMPS)  
For saving overhead power consumption and to insure  
optimal performance disregarding the mains voltage, the  
unit is equipped with a high efficiency compact Switched  
Mode Power Supply (SMPS). Using switched technology  
both in amplifiers and power supply can reduce the heat  
sink size to about 1/3 the size of what it would be with  
regular power supply and class AB amplifiers.  
Global parameters NOT stored with presets  
• Ref. Levels  
• Analog Input Sensitivity  
• Selected Setup  
• BNC Sync  
Local Parameters  
Power saving shut down modes  
The amplifier can detect whether or not there is Input on  
the analog or digital line. If input is absent for more than  
half an hour all monitors in a network will go to sleep-  
mode. from which they can recover automatically when  
signal is received. The power up time from sleep is a few  
hundred ms.  
These parameters applies for individual  
monitors:  
Local parameters stored with presets  
• X-Curve  
• Parametric EQ setting (set via AIR PC-IP)  
• LFE Gain (subs)  
If Input signal is absent for more than 2½ hours the system  
will go into standby from which it can recover by user  
intervention such as touching the volume wheel on the  
Remote Control or by touching the Master monitor display.  
• LFE Low Pass (subs)  
• Rel. Level  
Local parameters NOT stored with presets  
• Bass and Treble  
• Delay  
Software updates  
• Lock status (set via AIR PC-IP)  
• Room position  
• Calibration Level  
Tasks  
Each monitor in a setup can be software updated via  
Network. This is done through PC/Mac using the AIR  
SOFT. Follow the Software update procedure as described  
• Phase (Subs)  
• Polarity (Subs)  
Reset Procedures  
Three different levels of “Reset” exists. For all three  
scenarios all connected monitors will be affected.  
The following Reset procedures are accessed by  
holding the ENTER key on the System Controller while  
powering up:  
Clear Monitor Settings  
All global and local parameters in connected monitors are  
reset. Preset and network settings are not affected.  
Reset all Settings  
A “factory” reset procedure that deletes all global and local  
parameter settings as well as preset and network settings.  
The following reset procedure is found in the Setup  
menu:  
Clear Setup for entire network  
Select this reset procedure to clear all network settings.  
51  
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CABLES  
TC LINK Standard Cat-5 cables  
Maximum Cable Length : 15 meter.  
Cable type  
: Shielded Ethernet Cable  
Category 5.  
Connector type  
: RJ45  
This connection is carrying Digital audio (24 bit) and  
network control information.  
Serial to Cat-5 cable  
- included with the AIR SOFT and AIR  
PC-IP. This is a proprietary cable with  
build in electronics for use with AIR  
Systems only !  
P1  
P1  
1
P2  
1
Color  
Brown  
2
2
White/Brown  
Green  
3
3
4
4
White/Blue  
Blue  
5
5
6
6
White/Green  
Orange  
7
7
8
8
White/Orange  
P2  
AES/EBU Standard cables  
USB to COM 9pin  
Maximum Cable Length: 100 m  
- NOT included with AIR SOFT or AIR  
PC-IP. Use this type of converter in  
Cable type:  
110 Ohm  
XLR  
Connector type:  
conjunction with the Cat5 to Serial cable  
described above if your computer has a  
USB connection only and no serial port.  
XLR - XLR  
Pin 1 - Pin 1 (Ground)  
Pin 2 - Pin 2 (Hot)  
Pin 3 - Pin 3 (Cold)  
52  
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AIR TECHNICAL SPECIFICATIONS  
AIR 6 & AIR 15 (Master and Slave)  
Model  
AIR 6  
AIR 15  
System  
Two-way Active Nearfield Monitor  
40 Hz – 22 kHz  
> 128 dB peak  
> 126 dB peak  
104 dB RMS  
+/- 0.2 dB  
45 Hz  
12.1 liters  
Bass reflex  
Two-way Active Nearfield Monitor  
33 Hz – 22 kHz  
> 128 dB peak  
> 126 dB peak (no LFE)  
103 dB RMS  
+/- 0.2 dB  
40 Hz  
27 liters  
Bass reflex  
Frequency response (+/- 3 dB)  
Peak SPL 1m, pair (IEC Short Term)  
Peak SPL 2m, 5.1 (IEC Short Term)  
Max SPL 1m, (IEC Long Term)  
Precision of monitor matching  
Port tuning frequency  
Internal cabinet volume  
Bass principle  
Crossover frequency  
Crossover slope  
Tweeter  
2150 Hz (DSP generated)  
24 dB/oct (Linkwitz Riley, DSP generated)  
Esotec 28 mm / 1.1" soft dome, rear chamber, magnetic fluid,  
4mm die-cast alu front, pure alu wire voice coil  
175 mm / 6.5", one-piece molded polyprop cone, 75 mm / 3"  
pure alu voice coil, magnetic shielded  
100 to 240 VAC, 50 to 60 Hz (auto-select)  
40 W @ 1/8 max power (IEC 60065)  
2150 Hz (DSP generated)  
24 dB/oct (Linkwitz Riley, DSP generated)  
Esotec 28 mm / 1.1" soft dome, rear chamber, magnetic fluid,  
4mm die-cast alu front, pure alu wire voice coil  
240 mm / 10", one-piece molded polyprop cone, 100 mm / 4"  
pure alu voice coil  
Woofer  
Mains voltage  
Power consumption  
100 to 240 VAC, 50 to 60 Hz (auto-select)  
40 W @ 1/8 max power (IEC 60065)  
Finish  
Amp  
Cabinet  
Dimensions (H x W x D)  
Weight  
Black anodized aluminum back plate  
Dark gray MDF baffle, Silver foil  
338 x 216 x 345mm / 13,3” x 8,5” x 13,6”  
9.8 kg / 21.8 lbs  
Black anodized aluminum back plate  
Dark gray MDF baffle, Silver foil  
425 x 275 x 395mm / 16,7” x 10,8” x 15,5”  
15.5 kg / 34.5 lbs  
Amplifier  
Tweeter and woofer  
Tweeter 200 W PWM amp/Woofer 200 W PWM amp  
Tweeter 200 W PWM amp/Woofer 200 W PWM amp  
AIR 20 & AIR 25 (Master and Slave)  
Model  
AIR 20  
AIR 25  
System  
Three-way Semiactive Nearfield Monitor  
31 Hz –22 kHz: +/- 3dB  
131 dB peak  
129 dB peak  
104 dB RMS  
+/- 0.2 dB  
40 Hz  
35 liters  
Bass reflex  
Three-way Active Nearfield Monitor  
28 Hz –22 kHz: +/- 3dB  
134 dB peak  
132 dB peak  
107 dB RMS  
+/- 0.2 dB  
35 Hz  
68 liters  
Frequency response (+/- 3 dB)  
Peak SPL 1m, pair (IEC Short Term)  
Peak SPL 2m, 5.1 (IEC Short Term)  
Max SPL 1m, (IEC Long Term)  
Precision of monitor matching  
Port tuning frequency  
Internal cabinet volume  
Bass principle  
Bass reflex  
Crossover frequency  
Crossover slope  
390 Hz (DSP generated) and 2600 Hz  
12 dB/oct and 6 dB/oct  
400 Hz (DSP generated) and 2400 Hz (DSP generated)  
Tweeter  
Esotar 28 mm / 1.1” soft dome, neodymium magnet, rear chamber, Esotar 28 mm / 1.1” soft dome, neodymium magnet, rear cham-  
magnetic fluid, 4mm steel front, pure alu wire voice coil  
145 mm / 5,5", one-piece molded polyprop cone, 38 mm / 1,5"  
pure alu voice coil  
240 mm / 9,5", one-piece molded polyprop cone, 100 mm / 4"  
pure alu voice coil  
ber, magnetic fluid, 4mm steel front, pure alu wire voice coil  
145 mm / 5,5", one-piece molded polyprop cone, 38 mm / 1,5"  
pure alu voice coil  
2x240 mm / 9,5", one-piece molded polyprop cone, 100 mm /  
4" pure alu voice coil  
Midrange  
Woofer  
Mains voltage  
Power consumption  
100 to 240 VAC, 50 to 60 Hz (auto-select)  
45 W @ 1/8 max power (IEC 60065)  
100 to 240 VAC, 50 to 60 Hz (select)  
45 W @ 1/8 max power (IEC 60065)  
Finish  
Amp  
Cabinet  
Dimensions (H x W x D)  
Depth incl. amp and driver:  
Weight  
Black painted back plate  
Black painted back plate  
Black ash with dark gray MDF baffle  
510 x 535 x 450 mm /20” x 21” x 17,7”  
490mm / 19,3”  
Black ash with dark gray MDF baffle  
575 x 310 x 395 mm / 22,6” x 12,2” x 15,5”  
435mm / 17,0”  
28 kg / 62.2 lbs  
46 kg / 101 lbs  
Amplifier  
Tweeter, midrange and woofer  
Tweeter & Midrange 200 W amp/Woofer 200 W amp  
Tweeter 300 W amp/Midrange 300 W amp/Woofer 2x300 W amp  
53  
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AIR TECHNICAL SPECIFICATIONS  
AIR-Base-1 & AIR-Base-2  
System:  
Active Subwoofers  
Total frequency response:  
25 Hz – bssmng: 120 Hz, LFE: 2.5 kHz/  
23 Hz – bssmng: 120 Hz, LFE: 2.5 kHz : +/-3dB  
119 dB peak / 121 dB peak  
113 dB peak / 115 dB peak (no front, rear & center)  
+/- 0.2 dB  
Max. SPL 1m, one (IEC Short Term)  
Max. SPL 2m, 5.1 (IEC Short Term)  
Precision of monitor matching:  
Port tuning frequency:  
30 Hz / 27 Hz  
Internal cabinet volume:  
Bass principle:  
37 liters / 78 liters  
Bass reflex  
Woofer:  
1 / 2 pcs. 240 mm / 10", one-piece molded polyprop cone, 100  
mm / 4" pure alu voice coil  
Mains voltage:  
Power consumption:  
100 to 240 VAC, 50 to 60 Hz (auto-select)  
40 W @ 1/8 max power (IEC 60065)  
Finish  
Amp:  
Cabinet:  
Black anodized aluminum back plate  
Dark gray MDF baffle, Silver foil  
Dimensions (H x W x D):  
310 x 480 x 420mm / 900 x 310 x 420mm  
(12.2” x 18,9” x 16.5” / 35.4” x 12.2” x 16.5”)  
Depth incl. amp and driver: 447mm / 447mm (17.6” / 17.6”)  
18 kg / 29 kg (39.6 lbs / 63.8 lbs)  
250 W PWM amp  
Weight:  
Amplifier  
AIR Base 12  
System:  
AIR Base 12  
Total frequency response:  
Max. SPL 1m, one (IEC Short Term)  
Max. SPL 2m, 5.1 (IEC Short Term)  
Precision of monitor matching:  
Port tuning frequency:  
Internal cabinet volume:  
Bass principle:  
Active Subwoofer  
22 Hz – 200 Hz +/- 3 dB, dep. on setting  
123dB peak  
117dB peak  
+/- 0.2 dB  
24 Hz  
41 litres  
Woofer:  
Bass reflex. Downfiring port  
1 pcs. 300 mm/12", two-piece molded poly-  
prop cone, 75 mm/3" pure copper voice coil  
100 to 240 VAC, 50 to 60 Hz (select)  
Idle: 50 W/Max: 375 W  
Mains voltage:  
Power consumption:  
Finish  
Amp:  
Cabinet:  
Dimensions (H x W x D):  
Black painted metal back plate  
Black ash with dark gray MDF baffle  
460 x 360 x 502mm (18.1 x 14.2 x 19.7)  
Depth incl. amp and driver: 550 mm (not moving) Height incl. “feet”:  
738  
Weight:  
Amplifier  
38 kg (83.8 lbs)  
500 W amp  
AIR Base 24  
System:  
AIR Base 24  
Total frequency response:  
Max. SPL 1m, one (IEC Short Term)  
Max. SPL 2m, 5.1 (IEC Short Term)  
Precision of monitor matching:  
Port tuning frequency:  
Internal cabinet volume:  
Bass principle:  
Active Subwoofer  
20 Hz – 200 Hz +/- 3 dB, dep. on setting  
126dB peak  
120 dB peak  
+/- 0.2 dB  
22 Hz  
77 litres  
Woofer:  
Bass reflex. Downfiring port  
2 pcs. 300 mm/12", two-piece molded poly-  
prop cone, 75 mm/3" pure copper voice coil  
100 to 240 VAC, 50 to 60 Hz (select)  
Idle: 50 W/Max: 375 W  
Mains voltage:  
Power consumption:  
Finish  
Amp:  
Cabinet:  
Dimensions (H x W x D):  
Black painted metal back plate  
Black ash with dark gray MDF baffle  
720 x 360 x 502mm (28.3 x 14.2 x 19.7)  
Depth incl. amp and driver: 550 mm (not moving) Height incl. “feet”:  
738  
Weight:  
Amplifier  
60 kg (132.3 lbs)  
700 W amp  
54  
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AIR TECHNICAL SPECIFICATIONS  
Room & Distance  
Typical listening distance  
AIR 6  
1.2-2 m / 4-7 ft  
Typical room size  
AIR 6  
AIR 15  
1.5-2.5 m / 5-8,5 ft  
AIR 20  
1.5-3 m / 5-10.2 ft  
AIR 25  
AIR 25  
AIR 15  
AIR 20  
50-100 m3 / 1600-3500 ft  
AIR-Base-1  
30-60 m3 / 1000-2000 ft3  
75-125 m3 /2600-4400 ft  
AIR-Base-2  
50-100 m3 / 1600-4400 ft3  
80-130 m3 / 2800-4600 ft3  
Two or three AIR-Base-1’s  
50-100 m3 / 1600-3500 ft3  
Two or three AIR-Base-1’s  
75-125 m3 / 2600-4400 ft3  
General specifications for AIR 6, AIR 15, AIR 20, AIR 25, AIR-Base-1, AIR-Base-2, AIR-Base 12 & AIR Base 24  
System sample rates  
Internal sample rate  
192 and 176.4 via Dual Wire (optional Digital Card required) and  
96, 88.2, 64, 48, 44.1 or 32 kHz  
AIR Masters only  
I/O Connectors  
Formats  
XLR (2 channels AES/EBU in) 3 x RJ45 proprietary TC LINK  
AES/EBU (24 bit)  
Word clock input  
Display  
BNC, 75 ohm, 0.6 to 10 Vpp  
2 x 16 character dot matrix  
Operation  
Menu system / four buttons  
Analog input option  
Input connectors  
Impedance  
Selectable full scale input level  
Dynamic Range  
THD+N  
XLR balanced (pin 2+, pin 3-)  
10/3 k Ohm (Balanced/unbalanced)  
+9, +15, +21, +27 dBu  
> 113 dB typ. (unweighted), BW: 20-20kHz  
< -105 dB typ. @ 1 kHz, -3 dBFS  
< -120 dB, 20 Hz to 20 kHz  
Crosstalk  
A to D Conversion  
24 bit (Dual bit delta sigma sampling at 4.1/5.6/6.1/6.1 MHz)  
AIR Slaves only  
I/O Connectors  
2 x RJ45 proprietary TC LINK  
General for all Products  
EMC complies with:  
Safety certified to:  
EN 55103-1 and EN 55103-2, FCC part 15 class B, CISPR 22 class B  
IEC 60065, EN 60065, UL 6500 and CSA E60065 CSA FILE  
#LR108093  
Environment operating Temperature:  
Storage Temperature:  
Humidity:  
32° F to 122° F (0° C to 50° C)  
-22° F to 167° F (-30° C to 70° C)  
Max. 90 % non-condensing  
Warranty  
2 years on parts and labor  
AIR Remote specs  
AIR Remote  
Finish:  
Black anodized aluminum and plastic  
Dimensions (D x W x H):  
Weight:  
120 x 70 x 35 mm  
250g  
I/O Connectors:  
1 x RJ45 proprietary TC LINK  
EMC  
Complies with:  
EN 55103-1 and EN 55103-2,  
FCC part 15 class B, CISPR 22 class B  
Safety  
Certified to:  
IEC 60065, EN 60065, UL 6500 and CSA E60065  
CSA FILE #LR108093  
Environment  
Operating Temperature:  
Storage Temperature:  
Humidity:  
32° F to 122° F (0° C to 50° C)  
-22° F to 167° F (-30° C to 70° C)  
Max. 90 % non-condensing  
Warranty  
Parts and labor:  
1 year on parts and labor  
55  
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DELAY IN SYSTEM & ERROR MESSAGES ETC.  
Sample Rate  
(AES or WC In)  
Digital Input  
Analog Input *)  
Converter  
kHz  
Samples @ msec  
Input Rate  
centimeter Samples @  
msec  
centimeter  
kHz  
Converter Rate  
93.00  
68.00  
40.00  
34.00  
34.00  
34.00  
2.91  
1.54  
0.83  
0.53  
0.39  
0.35  
100  
53  
29  
18  
13  
12  
73.00  
73.00  
73.00  
73.00  
73.00  
73.00  
1.14  
0.83  
0.76  
1.14  
0.83  
0.76  
39  
28  
26  
39  
28  
26  
32.00  
44.10  
48.00  
64.00  
88.20  
96.00  
64.00  
88.20  
96.00  
64.00  
88.20  
96.00  
*): In Analog Input mode without WC Input selected, the system runs on the Master monitor's own 96kHz clock.  
Standby  
Error messages etc.  
Displayed when no Input signal has been detected for  
more than 30 min. below -65 dB. The Amplifier is turned  
off. Standby mode is released as soon a signal level above  
The "!" indicates that the monitor is not connected to the  
-65dB has been detected.  
"!" as "96 kHz Center!”  
network. The volume is then automatically set to -50 dB for  
the monitor not recognized.  
>> Power save <<  
Displayed when no signal has been detected on all  
"+" as "96 kHz L Front+":  
monitors on network for more than 2½ hours. Power is  
The "+" indicates that the monitor you are looking at is the  
turned off. Exit this mode by pressing any key on system  
System Controller.  
controller or adjusting volume from remote.  
>> A-Input Lo <<  
This is displayed in analog setups only and indicates that  
the Input level has been detected to be between -60dB and  
-20dB for a period longer than 3 minutes. This is a hint to  
turn up the Analog Input Gain  
Analog Input gain range:  
+9dBu, +15dBu, +21dBu or 27 dBu.  
>> A-Input Hi <<  
This is displayed in analog setups only and indicates that  
an Input level near 0dB is detected. (peaks in 2 sec. above  
-1 dB). This is a warning and you should turn down the  
Analog Input gain range:  
+9dBu, +15dBu, +21dBu or 27 dBu.  
>> PSU error <<  
Displayed if the power supplies fails. The power will be  
turned off and the monitor cannot operate. Please get in  
touch with the TC Electronic Support Team via  
<Locked>  
Displayed when a parameter is locked by the installer  
software and cannot be changed.  
Parameter lock can only be unlocked with AIR IP software.  
56  
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CERTIFICATE OF CONFORMITY  
Certificate Of Conformity  
TC Electronic A/S, Sindalsvej 34, 8240 Risskov,  
Denmark, hereby declares on own responsibility that  
following products:  
AIR 6  
AIR 15  
AIR 20  
AIR 25  
AIR-Base 1  
AIR-Base 2  
AIR-Base 12  
AIR-Base 24  
AIR REMOTE  
- that are covered by this certificate and marked with  
CE-label conforms with following standards:  
EN 60065  
(IEC 60065)  
Safety requirements for mains  
operated electronic and related  
apparatus for household and similar  
general use  
EN 55103-1  
EN 55103-2  
Product family standard for audio,  
video, audio-visual and entertainment  
lighting control apparatus for  
professional use. Part 1: Emission.  
Product family standard for audio,  
video, audio-visual and entertainment  
lighting control apparatus for  
professional use. Part 2: Immunity.  
With reference to regulations in following directives:  
73/23/EEC, 89/336/EEC  
Issued in Risskov, December 2002  
Mads Peter Lübeck  
Chief Executive Officer  
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PRESET LIST  
58  
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