M Audio Computer Monitor DSM1 User Manual

M-Audio Studiophile DSM1  
Active Studio Monitors  
English  
User Guide  
Important Safety Instructions  
1. READ INSTRUCTIONS  
9. HEAT  
All the safety and operating instructions should be read before  
the appliance is operated.  
Do not install near any heat sources such as radiators, heat  
registers, stoves, or other apparatus (including amplifiers) that  
produce heat.  
2. RETAIN INSTRUCTIONS  
The safety and operating instructions should be retained for  
future reference.  
10. CLEANING  
The appliance should be cleaned only with dry cloth.  
3. HEED WARNINGS  
11. POWER SOURCES  
All warning on the appliance and in the operating instructions  
should be adhered to.  
The appliance should be connected to a power supply only of  
the type described in the operating instructions or as marked  
on the appliance.  
4. FOLLOW INSTRUCTIONS  
All operating and use instructions should be followed.  
12. POWER CORD PROTECTION  
Power-supply cord should be routed so that they are not likely  
to be walked on or pinched by items placed upon or against  
them, playing particular attention to cords at plugs,  
convenience receptacles, and the point where they exit from  
the appliance.  
5. WATER AND MOISTURE  
The appliance should not be used near water – for example,  
near a bathtub, washbowl, kitchen sink, laundry tub, in a wet  
basement, or near a swimming pool, etc.  
13. POLARIZED PLUG  
6. CARTS AND STANDS  
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. When the provided plug does not fit into your  
outlet, consult an electrician for replacement of the obsolete  
outlet.  
The appliance should be used only with  
a cart or stand that is recommended by  
the manufacturer.  
6A. An appliance and cart combination  
should be moved with care. Quick  
stops, excessive force, and uneven  
surfaces may cause the appliance and  
cart combination to overturn.  
14. UNPLUG POWER CORD  
Unplug this apparatus during lightning storms or when unused  
for long periods of time.  
7. WALL OR CEILING MOUNTING  
This equipment is not designed for use mounted on a wall or a  
ceiling.  
15. OBJECT AND LIQUID ENTRY  
No object filled with liquids, such as vases, etc. shall be placed  
on the apparatus.  
8. VENTILATION  
The appliance should be situated so that its location or  
position does not interfere with its proper ventilation. For  
example, the appliance should not be situated on a bed, sofa,  
rug, or similar surface that may block the ventilation openings,  
or places in a built-in installation, such as bookcase or cabinet  
that may impede the flow of air through the ventilation  
openings.  
16. ACCESSORIES  
Only use attachments/accessories specified by the  
manufacturer.  
17. SERVICING  
The user should not attempt to service the appliance beyond  
that described in the operating instructions. All other servicing  
should be referred to qualified service personnel.  
At least 30 cm free space around the unit for normal  
ventilation is required.  
18. DAMAGE REQUIRING SERVICE  
The appliance should be serviced by qualified service  
personnel when:  
a) The power-supply cord or the plug has been damaged; or  
b) Objects have fallen, or liquid has been spilled into the  
appliance; or  
c) The appliance has been exposed to rain; or  
d) The appliance does not appear to operate normally or  
exhibits a marked change in performance; or  
e) The appliance has been dropped, or the enclosure is  
damaged.  
contents  
Chapter 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
What’s in the Box? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
About the Speakers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Chapter 2. Overview of the DSM1 Speaker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
Back Panel Connectors and Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Chapter 3. Setup and Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Setting Up the Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Configuring and Connecting AC Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Power Up and Power Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Connecting Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Configuring Speaker Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Tips for Best Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Appendix A. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Reference Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Contents  
v
vi M-Audio Studiophile DSM1 Guide  
chapter 1  
Introduction  
Thank you for choosing M-Audio®  
Features  
Studiophile® DSM active reference speakers.  
DSM1 speakers have the following features:  
• Self-powered, bi-amplified operation  
• Selectable analog and digital inputs  
• Custom-tuned enclosures  
This guide provides installation and operation  
instructions for the M-Audio DSM1 speaker.  
DSM1 speakers feature high-end design ele-  
ments and precision control circuitry, engi-  
neered to provide exceptional tonal accuracy,  
clarity and dynamic range in a wide variety of  
applications.  
• Advanced driver design and materials  
• Onboard DSP for crossover control, EQ, and  
volume trim  
Whats in the Box?  
• One DSM1 speaker  
About the Speakers  
• One AC power cable  
Amplifiers  
• Four acoustic isolation pads  
• M-Audio Registration Information Card  
M-Audio DSM1 speakers feature built-in  
amplifiers.  
Bi-Amplification DSM1 HF and LF drivers are in-  
dependently powered by two separate, low-dis-  
tortion internal power amplifiers.  
Class D Design DSM1 Class D amplifiers com-  
bine the efficiency and size advantages of a dig-  
ital amplifier with the precision, control and  
sound quality of linear amplification.  
Chapter 1: Introduction  
1
       
Inputs  
Drivers  
M-Audio DSM1 speakers allow analog or digital  
inputs. Input type is selectable with the Input  
Select switch on the back panel of the speaker.  
Each input type has two available connectors.  
LF Driver DSM1 speakers have a 6.5-inch LF  
driver with a steel frame and single-piece anod-  
ized aluminum diaphragm.  
HF Driver DSM1 speakers have a 1-inch HF driver  
with a soft-dome ferro-fluid cooled design that  
ensures smooth, accurate reproduction of high-  
frequency details.  
Analog Inputs The analog input signal is sam-  
pled on input and processed digitally until it  
reaches the power amplifier stage.  
Available analog inputs include balanced XLR  
and 1/4-inch TRS connectors. These analog in-  
puts are summed so that both input connectors  
may be used at the same time.  
Digital Signal Processing  
DSM1 speakers employ 36-bit digital signal pro-  
cessing for control of crossover, EQ, and chan-  
nel assignment settings.  
Digital Inputs The digital inputs automatically  
detect the sample rate and bit depth of the in-  
put, and accept up to 192kHz/24-bit signals.  
Crossover The crossover function is handled by  
a digital processor that ensures flat, distortion-  
free integration of the LF and HF drivers.  
Available digital inputs include AES/EBU and  
S/PDIF connectors. Only one digital connector  
may be used at a time.  
EQ and Placement Settings Six filters allow for  
customization of speaker response to a variety of  
sonic conditions and speaker orientations in  
your studio.  
Enclosure  
DSM1 speakers feature a high-efficiency, rein-  
forced medium-density fiberboard enclosure.  
Digital Channel Assignment When working with  
digital input, this switch is used to select the  
channel to be monitored in the speaker.  
Custom Waveguides The front panel waveguides  
are designed to maintain accurate frequency re-  
sponse and stereo imaging.  
Volume Trim The Volume Trim control adjusts  
level of the input signal in the digital domain.  
Bass Reflex Port A dual-flange bass reflex port  
provides enhanced low frequency response and  
clarity, while minimizing extraneous noise and  
vibration.  
2
M-Audio Studiophile DSM1 Guide  
chapter 2  
Overview of the DSM1 Speaker  
This chapter describes the connectors, controls and features of the DSM1 speaker.  
Back Panel Connectors and Controls  
Analog Input (XLR)  
Analog Input (TRS)  
Bass Reflex Port  
Volume Trim knob  
Analog Input Sensitivity  
switch  
Digital Input (S/PDIF)  
Digital Thru (S/PDIF)  
Digital Input (AES/EBU)  
Digital Channel Assignment  
switch  
Input Selector  
switch  
Voltage selector  
Power switch  
EQ Setting  
switches  
AC connector  
Fuse holder  
Figure 1. Back panel of the DSM1  
Chapter 2: Overview of the DSM1 Speaker  
3
   
Digital Standby Activates the digital inputs of  
the speaker, but automatically puts the speaker  
in a low-power standby mode when the digital  
clock signal is lost for more than one second (for  
example, when the digital source is powered  
off). When the clock signal is restored, the  
speaker wakes up from standby mode.  
Power Connections  
AC Connector and Power Switch  
The AC connector accepts a standard modular  
AC power cord. One power cord is included with  
your speaker. Use the Power switch to turn the  
speaker on or off.  
Analog Inputs  
Voltage Selector  
The DSM1 speaker provides an XLR analog in-  
put connector and a balanced 1/4-inch TRS ana-  
log input connector.  
Before connecting a DSM1 speaker to a power  
source, make sure the Voltage Selector setting  
matches your local voltage (100–120V or  
220–240V).  
The analog input signal is converted to a  
96 kHz, 24-bit digital signal for crossover/EQ  
processing, and converted back to analog just  
prior to the power stage of the driver amplifiers.  
Fuse  
The fuse protects components of the DSM1  
speaker from being damaged by electrical under-  
or over-powering, spikes, and other anomalies.  
Signals may be sent to the two analog input con-  
nectors at the same time. When two analog in-  
put signals are present, they are summed.  
A 2.5 Amp fuse is required for both the  
100–120V and the 220–240V settings.  
XLR Connector  
Make sure to use a fuse rated at 2.5 Amps.  
Do not use fuses of any other rating, or you  
risk damage to the unit  
The XLR Analog In connector is balanced. (If the  
signal source is unbalanced, connect the unused  
pin to ground.)  
1/4-inch TRS Connector  
Inputs  
The 1/4-inch TRS Analog In connector is bal-  
anced. (If the signal source is unbalanced, con-  
nect the unused pin to ground.)  
Input Selector Switch  
The input selector switch selects between the  
following input states for the speaker:  
Analog Input Sensitivity Switch  
Analog Activates the analog inputs of the  
The analog input operating level can be  
switched between –10 dBV and +4 dBu. This set-  
ting applies to both the XLR and 1/4-inch TRS  
analog inputs. For information on the appropri-  
ate operating level for your audio source, see the  
manufacturer’s specifications.  
speaker.  
Digital Activates the digital inputs of the  
speaker.  
4
M-Audio Studiophile DSM1 Guide  
 
Digital Inputs  
EQ Settings  
The DSM1 speaker provides an AES/EBU Digital  
In connector as well as S/PDIF Digital In and  
S/PDIF Digital Thru connectors.  
The DSM1 speaker has a series of 12 switches for  
setting the following EQ controls:  
High-Frequency Shelf Sets an adjustable high fre-  
quency boost or cut using a built-in HF shelf-  
type EQ.  
The digital inputs accept sample rates of 44.1,  
48, 88.2, 96, 176.4 and 192 kHz (+/– 10 percent)  
at 16-bit or 24-bit resolution.  
Mid-Range EQ Sets an adjustable midrange fre-  
quency boost or cut using a built-in peak/notch-  
type EQ.  
Only one digital input connector (AES/EBU In  
or S/PDIF In) may be used at a time.  
Low-Frequency Shelf Sets a low frequency cut us-  
ing a built-in LF shelf-type EQ, which lets you  
tune the speaker’s bass response to fit your mon-  
itoring environment.  
AES/EBU Digital In  
The AES/EBU digital input is a female XLR con-  
nector.  
High-Pass Filter Sets a high-pass type EQ, which  
lets you establish the lower limit of the speaker’s  
frequency response.  
S/PDIF Digital In  
This S/PDIF connector is for connecting digital  
audio from a S/PDIF source device, or from the  
S/PDIF Thru connector of another DSM1  
speaker.  
Desktop 220 Hz Cuts around a center frequency  
of 220 Hz using a built-in notch-type EQ, which  
lets you compensate for the effects of frequency  
buildup when your DSM1 speaker is placed on a  
reflective surface.  
S/PDIF Digital Thru  
This S/PDIF connector passes digital input from  
either the AES/EBU Digital In or the S/PDIF Dig-  
ital In connector to the S/PDIF Digital In con-  
nector of another DSM1 speaker.  
Desktop 175 Hz Cuts around a center frequency  
of 175 Hz using a built-in notch-type EQ, which  
lets you compensate for the effects of frequency  
buildup when your DSM1 speaker is placed on a  
reflective surface.  
Digital Channel Assigment  
Desktop 200 Hz By using both the Desktop  
220 Hz and the Desktop 175 Hz settings, you  
can cut around a center frequency of 200 Hz to  
compensate for the effects of frequency buildup  
when your DSM1 speaker is placed on a reflec-  
tive surface.  
The DSM1 speaker has a digital channel assign-  
ment switch that lets you monitor the left chan-  
nel, right channel, or a summed (mono) mix of  
the left and right channels of the digital input.  
Volume Trim Control  
The Volume Trim control adjusts the level of the  
input signal in the digital domain. Trim values  
range from –22 dB to +10 dB.  
Chapter 2: Overview of the DSM1 Speaker  
5
Front Panel  
LED indicator  
Front panel of the DSM1  
Front Panel LED  
The LED indicator on the front of the DSM1  
speaker indicates the following states:  
Front Panel LED States  
LED State  
Indication  
Blue  
Analog Input  
Digital Input: Lock  
Yellow  
Digital Input: No Lock  
Digital Standby Mode  
Clipping  
Blue (flashing)  
Red  
Red (flashing)  
Hardware failure  
6
M-Audio Studiophile DSM1 Guide  
 
chapter 3  
Setup and Operation  
This chapter provides instructions for placing,  
connecting and configuring DSM1 speakers.  
Setting Up the Speakers  
Speakers should always be placed to provide bal-  
anced, accurate sound in your preferred mixing  
position. The exact location depends on the size  
and acoustics of the environment where you are  
using the speakers.  
Correct placement, connection, and configura-  
tion ensures optimal performance and safe oper-  
ation of your speakers.  
In all installations, observe the following guide-  
lines:  
Getting Started  
Unpacking the Speakers  
• Place the speakers on quality stands, or  
place them in a stable location where they  
are suitably isolated from vibration  
After opening the box, be sure to reach down  
the sides of the speaker to lift it out of its box.  
This protects the HF and LF drivers on the front  
from being dented or punctured, and prevents  
any possible damage to the switches, connec-  
tors, and other controls on the back of each  
speaker.  
• Do not soffit mount or otherwise install the  
speakers in an enclosed space. The speakers  
require free air flow around the back panel.  
Do not restrict air flow around the speakers.  
Reusing the Speaker Packaging  
Retain your packaging for future use. The car-  
tons are durable and reusable, and can be used  
to safely transport your speakers.  
Chapter 3: Setup and Operation  
7
     
Stereo Positioning  
Speaker Orientation  
The following diagram shows the recommended  
setup for stereo monitoring.  
For the best sonic results, DSM1 speakers should  
be set in a vertical orientation. Vertical place-  
ment minimizes the effects of interference be-  
tween the drivers and provides the largest hori-  
zontal (side-to-side) listening window as well as  
the most stable and consistent frequency re-  
sponse and imaging.  
0.5m/20"  
DSM1 vertical orientation (stereo)  
Stereo placement  
Speaker Location  
Surround Positioning  
Make sure speakers are placed symmetrically in  
relation to the listening position by doing the  
following:  
The following diagram shows the recommended  
setup for use in a 5.0 surround environment (a  
subwoofer is not shown in this diagram).  
Place speakers so that the HF drivers are ap-  
proximately the same height as your ears in the  
mixing position.  
CENTER  
FRONT RIGHT  
FRONT LEFT  
Place speaker pairs the same distance from the  
two sides of the room.  
25o  
30o  
30o  
Place speakers so that the backs of the speak-  
ers are a minimum of 6 inches (15 cm) from the  
wall to prevent obstruction of air flow in the  
bass ports.  
o
100  
o
135  
25o  
WITHIN  
THIS  
WINDOW  
REAR LEFT  
REAR RIGHT  
Surround placement  
8
M-Audio Studiophile DSM1 Guide  
Installing a Fuse  
Configuring and Connecting  
AC Power  
A 2.5 Amp fuse is required for both the  
100–120V and the 220–240V settings.  
Be sure to follow the instructions in this section  
for the proper configuration of fuses and voltage  
settings.  
Make sure to use a fuse rated at 2.5 Amps.  
Do not use fuses of any other rating, or you  
risk damage to the unit  
DSM1 speakers must be manually config-  
ured for the voltage in your area. Always  
check the voltage setting and fuse rating, as  
described below, before connecting and  
powering your speakers.  
To change the fuse:  
1 Turn off power to the speaker and disconnect  
the AC power cord.  
2 Use a small screwdriver to remove the fuse  
holder.  
Setting the Voltage  
Make sure the Voltage Selector setting on each  
speaker matches your local voltage (100–120V  
or 220–240V).  
Fuse  
holder  
Voltage  
selector  
Fuse holder  
3 Remove the currently installed fuse.  
4 Install the new fuse in the fuse holder.  
Voltage selector  
5 Replace the fuse holder so that it clicks into  
place.  
Chapter 3: Setup and Operation  
9
   
Connecting Power  
Connecting Audio  
To connect power to the speakers:  
This section explains how to make analog and  
digital audio connections to DSM1 speakers.  
1 Make sure you have set the Voltage Selector  
and installed the proper fuse before proceeding.  
Connecting Analog Inputs  
2 Connect the included AC power cord to the  
AC connector on the back panel of each speaker  
(one power cord is included with each speaker).  
Analog Input (XLR)  
Analog Input (TRS)  
AC  
connector  
Input Sensitivity  
switch  
Analog input section  
To connect an analog source:  
1 Do any of the following:  
AC connector  
• Connect a balanced XLR cable to the  
XLR In connector on the back panel of the  
speaker.  
3 Connect the other end of the AC power cord  
to your power source.  
• Connect a balanced 1/4-inch balanced TRS  
cable to the TRS In connector on the back  
panel of the speaker.  
Power Up and Power Down  
If you need to connect an unbalanced ana-  
Always power up your speaker system last (al-  
lowing mixers, recorders and other devices to  
fully power up first).  
2 Connect the other end of the cable to the an-  
alog audio source (for example, an analog out-  
put from your monitoring system).  
Conversely, always mute (or power off) your  
speaker system first, before powering off other  
devices in your studio.  
10 M-Audio Studiophile DSM1 Guide  
   
The Digital Thru S/PDIF port on this speaker is  
then connected to the Digital In port on the  
other speaker to supply it with its digital audio  
input.  
Connecting Digital Inputs  
S/PDIF Input  
Digital Input  
(AES shown)  
S/PDIF Thru  
S/PDIF Input  
S/PDIF Thru  
AES/EBU Input  
Digital input section  
DSM1 speakers accept digital input at the  
AES/EBU Digital Input (XLR connector) and the  
S/PDIF Digital Input.  
Only one digital input connector (AES/EBU In  
or S/PDIF In) may be active at a time. If the  
speaker receives digital input from more than  
one digital connector, digital lock may not be  
achieved and noise or distortion may result.  
In and Thru connections for digital input  
(AES source shown)  
Digital Channel Assignment  
When using digital input, you must configure  
the Channel Assign switches on the back of each  
speaker to set whether that speaker plays the  
Left or Right signal channel, accordingly.  
Connecting Digital Sources  
AES/EBU and S/PDIF digital protocols carry two  
channels of audio (left and right). If you are us-  
ing a digital source, you can connect it to either  
the AES Digital In or the S/PDIF In of one of the  
DSM1 speakers. (It does not matter which  
speaker is connected to the source.)  
Chapter 3: Setup and Operation 11  
To connect a digital source:  
Configuring Speaker Settings  
Volume Trim Settings  
1 Do any of the following:  
• Connect an AES cable (XLR) to the  
AES/EBU In port on the back of a speaker.  
• Connect a S/PDIF digital cable to the  
S/PDIF In port on the back of a speaker.  
The Volume Trim control lets you match the in-  
put sensitivity of speaker to the source.  
2 Connect the other end of the cable to the dig-  
ital audio source (for example, a digital output  
from an M-Audio interface).  
If you are monitoring an analog input, make  
sure you have set the Analog Input Sensitivity  
switch to match the operating level of your in-  
put source (–10 dBV or +4 dBu). For information  
on the appropriate operating level for your au-  
dio source, see the manufacturer’s specifica-  
tions. The maximum input levels for each sensi-  
tivity setting are shown below.  
3 Connect one end of a S/PDIF digital cable to  
the S/PDIF Thru port of the first speaker.  
4 Connect the other end of the S/PDIF digital  
cable to the S/PDIF In port of the second  
speaker.  
Maximum input levels  
5 Set the back panel Channel Assign switch to  
L (Left) or R (Right) as appropriate for the loca-  
tion of each speaker.  
Analog Input Sensitivity  
setting  
Maximum Input level  
(full-scale output)  
10 dBV  
3 dBV  
+4 dBu  
18 dBu  
Channel Assign  
switch  
The Volume Trim control adjusts the level of the  
input signal in the digital domain. Trim values  
range from –22 dB to +10 dB, in 0.5 dB steps.  
Setting the Volume Trim control to 0  
maximizes the Signal to Noise ratio.  
Channel Assign switch  
12 M-Audio Studiophile DSM1 Guide  
 
Setting the Mid-Range EQ  
EQ Settings  
The Mid-Range EQ lets you compensate for mid-  
range resonance or damping that may be cre-  
ated by speaker placement or room acoustics. It  
offers a low-Q (wide bandwidth) boost or cut.  
Start by leaving this switch in the “flat” (0 dB)  
position, then experiment with different set-  
tings to see if you like the results.  
The EQ controls on DSM1 speakers let you ad-  
just the response of the speaker to match your  
monitoring environment and studio equip-  
ment. For EQ frequency graphs for each of these  
Setting the High Frequency Shelf EQ  
The HF Shelf EQ lets you compensate for high  
frequency variations that may be created by  
source equipment or room acoustics. Start with  
the HF Shelf EQ setting “flat” (0 dB) as this pro-  
vides the most natural high-frequency response.  
To adjust the Mid-Range EQ:  
Set switches 3 and 4 to the positions shown  
below to activate the corresponding EQ levels.  
OFF  
OFF  
3
4
0 dB  
To adjust the HF Shelf EQ:  
ON  
ON  
Set switches 1 and 2 to the positions shown  
below to activate the corresponding EQ levels.  
+1.5 dB  
1.5 dB  
3.0 dB  
OFF  
OFF  
OFF  
OFF  
1
2
0 dB  
ON  
ON  
ON  
ON  
+1.5 dB  
1.5 dB  
3.0 dB  
OFF  
OFF  
Mid-Range EQ switches and settings  
ON  
ON  
HF Shelf switches and settings  
Chapter 3: Setup and Operation 13  
Setting the LF Shelf EQ  
Setting the High-Pass Filter  
Your choice for the LF Shelf setting depends on  
where you place the speakers within a room.  
The High Pass Filter lets you adjust the bass roll-  
off of your DSM1 speakers. Start with the filter  
all the way open (40 Hz setting) and only raise  
the cutoff frequency in order to protect the LF  
drivers at low frequencies, or to couple your  
DSM1 speakers with a subwoofer.  
0 dB If you've mounted your DSM1 speakers on  
speaker stands away from walls and corners, set  
the LF Shelf to 0dB, which will give you the flat-  
test near-field frequency response.  
To adjust the High Pass Filter:  
–1.5 dB If you've mounted your DSM1 speakers  
near a wall, or on a reflective surface such as the  
meter bridge of your console, set the LF Shelf to  
–1.5 dB, which activates a shelving filter to re-  
duce the low-frequency buildup.  
Set switches 7 and 8 to the positions shown  
below to activate the corresponding EQ levels.  
OFF  
OFF  
7
8
40 Hz  
60 Hz  
80 Hz  
100 Hz  
–3.0 dB If you've mounted your DSM1 speakers  
on stands in a corner, set the LF Shelf to –3.0 dB,  
which activates a shelving filter to reduce the  
low-frequency buildup.  
ON  
ON  
OFF  
OFF  
–4.5 dB If you've mounted your DSM1 speakers  
on a meter bridge (or other reflective surface), as  
well as in a corner, set the LF Shelf to –4.5 dB,  
which activates a shelving filter to reduce the  
low-frequency buildup.  
ON  
ON  
High-Pass Filter switches and settings  
Setting the Desktop Filters  
To adjust the LF Shelf EQ:  
The Desktop filters let you compensate for the  
effects of frequency buildup when your DSM1  
speaker is placed on a reflective surface such as a  
desktop or meter bridge, or within a reflective  
surface such as a shelf or case. Experiment with  
the EQ options centered around 175 Hz, 200 Hz  
(by using the 175 Hz and 220 Hz filters at the  
same time), or 220 Hz.  
Set switches 5 and 6 to the positions shown  
below to activate the corresponding EQ levels.  
OFF  
OFF  
5
6
0 dB  
ON  
ON  
1.5 dB  
3.0 dB  
4.5 dB  
OFF  
OFF  
ON  
ON  
LF Shelf EQ switches and settings  
14 M-Audio Studiophile DSM1 Guide  
To adjust the Desktop 220 Hz Filter:  
To adjust the Desktop 200 Hz Filter:  
Set switches 9 and 10 to the positions shown  
below to activate the corresponding EQ levels.  
Set switches 9, 10 11 and 12 to the positions  
shown below to activate the corresponding EQ  
levels.  
OFF  
OFF  
9
0 dB  
9
OFF  
OFF  
OFF  
OFF  
10  
10  
11  
12  
0 dB  
ON  
ON  
1.0 dB  
2.0 dB  
3.0 dB  
OFF  
OFF  
ON  
ON  
OFF  
OFF  
OFF  
OFF  
1.0 dB  
2.0 dB  
3.0 dB  
ON  
ON  
Desktop 220 Hz Filter switches and settings  
ON  
ON  
To adjust the Desktop 175 Hz Filter:  
Set switches 11 and 12 to the positions shown  
below to activate the corresponding EQ levels.  
ON  
ON  
ON  
ON  
OFF  
OFF  
11  
12  
0 dB  
Desktop 200 Hz Filter switches and settings  
ON  
ON  
1.0 dB  
2.0 dB  
3.0 dB  
OFF  
OFF  
Tips for Best Performance  
DSM1 speakers are built and tested to exacting  
standards with features to protect the units from  
failure under normal usage. Keep in mind the  
following:  
ON  
ON  
Desktop 175 Hz Filter switches and settings  
Overdriving the units for prolonged periods  
or not observing the warnings set out in this  
guide may result in failure.  
If distortion occurs, reduce the input level im-  
mediately.  
Both the HF and LF drivers are delicate and  
should not be touched. A damaged driver will  
adversely affect the performance of the speaker.  
As a precaution, always turn off the units be-  
fore plugging or unplugging signal connections  
or switching source equipment.  
Chapter 3: Setup and Operation 15  
 
Troubleshooting  
The LED located on the front of the unit indi-  
cates the following states of operation.  
Front Panel LED States  
LED State  
Indication  
Blue  
Analog Input  
Digital Input: Lock  
Yellow  
Digital Input: No Lock  
Digital Standby Mode  
Clipping  
Blue (flashing)  
Red  
Red (flashing)  
Hardware failure  
If the LED is lit solid blue and there is no sound, do  
the following:  
Check that the unit is receiving an analog sig-  
nal or valid digital signal.  
Check the temperature of the rear metal  
panel. If it is hot, turn the unit off for a mini-  
mum of five minutes to allow it to cool. When  
cool, turn the unit on and check for normal op-  
eration. If necessary, relocate the unit to ensure  
adequate ventilation.  
If the thermal shutdown activates a second  
time, contact M-Audio customer service.  
If the LED is unlit and there is no sound:  
Check fuse and power connection. If the fuse  
is intact and the power connection is good, but  
the LED remains unlit with no sound, contact  
M-Audio customer service.  
16 M-Audio Studiophile DSM1 Guide  
 
appendix a  
Specifications  
Technical Specifications  
DSM1 Specifications  
LF Driver  
HF Driver  
6.5-inch inverted anodized aluminum cone woofer with cone edge reinforcement  
30mm voice coil with symmetrical force motor and flux stabilization rings  
1-inch soft teteron dome tweeter with neodymium magnet and ferrofluid cooling  
Frequency Response 49 Hz–27 kHz +/–3 dB  
Crossover  
2.7 kHz Linkwitz-Riley 24 dB/octave  
Max SPL @ 1 meter 110 dB maximum peak SPL @ 1m for 1 unit (116 dB maximum peak per pair)  
Input Sensitivity  
LF power amplifier  
HF power amplifier  
THD+N  
+4 dBu pink noise input with Trim level set to 0 dB yields 90 dB @ 1m  
100 W (1% THD into 6 Ohms)  
80 W (0.5% THD into 6 Ohms)  
<0.05% (10 W into 6 Ohms)  
Soft Limit feature  
Independent anti-clipping limiters: tweeter limited to 0.5% THD, woofer limited to 5% THD  
Power Requirements User selectable for 90–130V~ 50/60 Hz or 180–264V~ 50/60 Hz  
DSP  
36-bit, 192 kHz processing  
Protection  
Analog Inputs  
Digital Inputs  
Over current, over temperature, turn-on/off transient, subsonic filter  
XLR balanced (20 kOhms) and 1/4-inch TRS balanced (20 kOhms)  
S/PDIF In and Thru (75 Ohms) and AES/EBU (110 Ohms);  
built-in phase-lock loop (PLL) to reclock incoming bitstreams with low jitter (<250 psec p-p);  
44.1, 48, 88.2, 96, 176.4, 192 kHz sample rates  
Indicator  
RGB LED  
Appendix A: Specifications 17  
   
Reference Diagrams  
dBV  
6
5
4
3
2
1
0
-1  
-2  
-3  
-4  
-5  
-6  
10 Hz 20  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
20K  
40K  
HF Shelf EQ levels  
dBV  
6
5
4
3
2
1
0
-1  
-2  
-3  
-4  
-5  
-6  
10 Hz 20  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
20K  
40K  
Mid-Range EQ levels  
18 M-Audio Studiophile DSM1 Guide  
   
dBV  
6
5
4
3
2
1
0
-1  
-2  
-3  
-4  
-5  
-6  
10 Hz 20  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
20K  
40K  
LF Shelf levels  
dBV  
5
0
-5  
-10  
-15  
-20  
-25  
-30  
-35  
10 Hz 20  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
20K  
40K  
High-Pass Filter levels  
Appendix A: Specifications 19  
dBV  
6
5
4
3
2
1
0
-1  
-2  
-3  
-4  
-5  
-6  
10 Hz 20  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
20K  
40K  
Desktop EQ (220 Hz) levels  
dBV  
6
5
4
3
2
1
0
-1  
-2  
-3  
-4  
-5  
-6  
10 Hz 20  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
20K  
40K  
Desktop EQ (175 Hz) levels  
20 M-Audio Studiophile DSM1 Guide  
dBV  
6
5
4
3
2
1
0
-1  
-2  
-3  
-4  
-5  
-6  
10 Hz 20  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
20K  
40K  
Desktop EQ (200 Hz) levels  
Appendix A: Specifications 21  
22 M-Audio Studiophile DSM1 Guide  
WARNING: This product contains chemicals, including lead, known to the State of California to cause cancer,  
and birth defects or other reproductive harm. Wash hands after handling.  
© 2008 Avid Technology, Inc. All rights reserved. Product features, specifications, system requirements and availabil-  
ity are subject to change without notice. Avid, M-Audio and Studiophile DSM are either trademarks or registered trade-  
marks of Avid Technology, Inc. All other trademarks contained herein are the property of their respective owners.  
Warranty  
Warranty Terms  
M-Audio warrants products to be free from defects in materials and workmanship, under normal use and  
provided that the product is owned by the original, registered user. Visit www.m-audio.com/warranty for terms  
and limitations applying to your specific product.  
Warranty Registration  
Immediately registering your new M-Audio product entitles you to full warranty coverage and helps M-Audio  
develop and manufacture the finest quality products available. Register online at www.m-audio.com/register to  
receive FREE product updates and for the chance to win M-Audio giveaways.  
ML07-242A0_DSM1_UG_EN_08/08  

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