QSC Audio Stereo System 914LZ User Guide

BASIS 914lz  
4X16 CobraNet Enabled Control and Monitoring Signal Processor  
Hardware Manual  
*TD-000200-00*  
TD-000200-00 rev.A  
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Introduction  
The BASIS 914lz provides the digital audio transport, signal  
processing, control and status monitoring facilities needed  
from anywhere a connection to the QSControl.net network  
is available.  
to bind a group of amplifiers and loudspeakers into an inte-  
grated functioning system. In conjunction with QSCon-  
trol.net software, the BASIS 914lz enables the user to  
design, test and deploy professional audio reinforcement  
and distribution systems ranging in size from one to hun-  
dreds of channels.  
The QSControl.net network can also be managed from a sin-  
gle computer running both the client and the server. Once all  
BASIS devices in a system are configured, a computer is no  
longer required on that system’s network. All basic func-  
tions of the BASIS 914lz continue to operate with or without  
a control computer connected to the network.  
Each QSC power amplifier connects directly to a BASIS  
914lz via one of its four QSC DataPorts. All mission-critical  
elements of the BASIS-driven sound system are monitored.  
User-selected events are logged and loudspeaker protection  
features unique to BASIS such as QSC's power limiter are  
made possible through the DataPort functionality.  
The configurable DSP engine provides all of the functions  
necessary to handle the amp/loudspeaker portion of a sig-  
nal chain, such as very flexible and precise crossovers,  
delays, equalization, compression/limiting, etc.  
Audio enters a BASIS 914lz either through analog XLR/TRS  
combo inputs (line level) or from CobraNet source devices  
such as QSC's line of RAVE digital audio routers. Any combi-  
nation of 16 CobraNet channels (selected from up to 4 bun-  
dles of 32 channels) can be routed into the 24 x 24 DSP  
engine. Any or all of the 24 DSP channels can also be routed  
to up to 32 CobraNet channels on the network.  
A standard Windows computer is the principle user-inter-  
face for controlling the overall BASIS/QSControl system.  
However, the BASIS 914lz also offers a front panel interface  
for accessing a few critical functions.  
A single QSControl.net server computer can support several  
clients running QSC's latest Venue Manager software. Thus,  
the sound system can be operated via several computers,  
roaming wireless laptops, tablets, etc., all at the same time,  
Unlike other configurable DSP boxes, the intrinsic process-  
ing latency of the BASIS 914lz is both short and fixed at  
1- Power indicator  
9- DataPorts  
2- Diagnostic indicator  
10- XLR/TRS combo inputs (line level)  
11- Omni inputs  
12- RS-232 port  
13- Network status indicators  
14- QSControl 10BaseT receptacle  
15- CobraNet 100BaseT receptacle  
16- IEC power inlet  
3- Network status indicators  
4- Port connection status indicators  
5- Multi-function push buttons  
6- Display  
7- Rotary select/accept knob  
8- Safe mode switch (recessed)  
See page 14 for detailed descriptions.  
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Introduction (continued)  
0.396 milliseconds. When analog input and analog outputs  
to visit us there.  
are used, the total delay is 2.354 milliseconds. The delay  
does not change regardless of the DSP configuration, unless  
the configuration intentionally adds more delay.  
We've applied our many years of experience in supporting  
high-end installed sound with our previous system-building  
products such as RAVE, QSControl, CM16a, DSP-3, DSP-4,  
and DSP-30. The BASIS 914lz brings all that technology  
together in one compact, powerful, easy to use system. We  
are confident that your new BASIS 914lz will provide years  
of dependable service and we hope it will help you, the sys-  
tem designer and implementer, to express your creative  
audio system ideas.  
The BASIS 914lz also supports the new optional low-latency  
CobraNet feature that provides transport at only 2.66 milli-  
seconds delay. Thus the delay from analog to analog across  
the network can be less than 6 milliseconds, fast enough  
not only for large audio distribution but for the most critical  
real-time live performance work.  
Both software and firmware can be easily updated over the  
network. In the future, QSC will be adding new capabilities  
to both BASIS and QSControl.net. Our latest code releases  
and access to up-to-date information on BASIS and QSCon-  
Block Diagram  
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Introduction - Networking the BASIS 914lz  
The BASIS 914lz has two RJ-45 network connection ports on the rear panel. One port is labeled "QSControl" and supports standard  
10BASE-T Ethernet. The other port is labeled "CobraNet" and supports 100BASE-TX, also known as "Fast Ethernet". In the following  
sections we describe the use of these ports and show example network connection schemes.  
The BASIS 914lz supports two distinct kinds of network activity; the first is audio transport via CobraNet, and the second is control and  
monitoring via QSControl.net. The user can choose to install one network for CobraNet traffic and a second separate network for  
QSControl.net traffic. We call this the "Two Wire Interface". Alternately, it is possible to run both control and audio traffic over Cobra-  
Net via the CobraNet port. In this case the QSControl port is unused. We call this the "Single Wire Interface".  
Under the most demanding real-time control conditions and when using the lowest latency CobraNet settings, users may experience  
better QSControl.net performance using separate networks, especially when displaying a great many real-time meters. For most appli-  
cations, separate networks won't provide any discernible benefits and will cost more. We therefore recommend using the Single Wire  
Interface when running CobraNet.  
If your application uses only analog I/O without CobraNet, then you should use the QSControl port for QSControl.net traffic and ignore  
the CobraNet port.  
Why CobraNet Needs Special Treatment:  
Ordinary Ethernet traffic has no guaranteed time of delivery. Packets of information may arrive at their destination out of order and  
some may be delayed more than others. This is fine for E-mail and even for downloading MP3 files over the Internet. Everything ends up  
properly reassembled at the destination, but how long this takes will vary according to network loading, span, etc. In contrast, Cobra-  
Net is "real time" - it delivers audio with a minimal, consistent transmission delay. CobraNet is designed to use as much of conventional  
networking technology as possible while providing both guaranteed time of delivery and isochronicity - maintaining a phase-locked  
sample-accurate clock across the entire network. These requirements mean that ordinary unregulated Ethernet data cannot be freely  
mixed with CobraNet information. The two can coexist on the same wire, but only by adhering to the proper rules.  
Notes on Network Systems Design:  
As with any communications system, the reliability and performance of a local area network is intimately related to the designer's skill  
and knowledge in implementing a topology that is robust, efficient and standards-compliant. Proper network design is even more criti-  
cal in distributed multimedia systems. Therefore, it is important for the system designer to realize that some conventional network  
practices must be avoided. Although each network design is unique and may carry its own performance requirements, compliance to  
the following three points will assist in building an audio network that is trouble free and efficient.  
First, audio and conventional data communications deliveries should not exist on the same LAN or VLAN. The exception to this is the  
BASIS 914lz Single Wire Interface, which offers a solution for converging audio and QSControl.net onto the same LAN or VLAN. How-  
ever, conventional communications, such as corporate networks, print services, e-mail and Internet access, should not exist alongside  
CobraNet audio and QSControl.net on the same LAN or VLAN. Further, CobraNet audio and QSControl.net data should not exist  
together on the same LAN or VLAN when implementing the Two Wire Interface. This is not to say that conventional communications  
cannot share the same network hardware with a BASIS 914lz. In fact, common network hardware, such as managed Ethernet switches  
and media converters, can service both BASIS 914lz products and conventional data communications equipment so long as the man-  
aged switch or media converter are partitioned into separate network domains. This is normally done by configuring a separate VLAN  
for each data type. (Some switches may allow individual port assignments or support partitions through DIP switch selection.)  
Second, CobraNet audio must traverse either a repeater domain or a network switch domain. The point here is that the CobraNet port  
on a BASIS 914lz must connect directly to, and only to, either a repeater LAN or a switched Ethernet LAN. Hybrid networks containing  
both repeaters and switches are not permitted on the audio segment. Connecting the CobraNet port to a repeater that is in turn con-  
nected to a network switch poses an illegal and non-compliant condition. We recommend always connecting the QSControl and/or  
CobraNet port(s) directly to network switch ports.  
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Third, the BASIS 914lz and QSControl.net system are targeted at network switch deployments. The consumer costs of Ethernet  
switches have continued to fall over the last several years and are now comparable with repeaters on a per port basis. In addition, the  
sophistication and scalability of network switches make them ideal for new installations. However, we do realize that designers may  
wish to add BASIS products to existing audio network installations that are built on repeater LAN topologies. This applies primarily to  
existing CM16a and RAVE networks. For this very reason we continue to support connectivity to network repeater hardware with the  
BASIS 914lz. Support for network repeaters exists only with the Two Wire Interface and only with the standard CobraNet forwarding  
latency. That is to say that the QSControl port and the CobraNet port must be connected to separate repeater LANs. Even when properly  
configured, audio channel capacity is severely limited and both audio and control network expansion is limited by the respective capac-  
ity of each segment. In other words, scalability ceases to exist when bandwidth demands on the QSControl.net segment approach 10  
Mbps and demand on the CobraNet segment approaches 100 Mbps. Obviously, we recommend taking advantage of switch network  
technology whenever possible.  
It should be noted here that while the CobraNet port on a BASIS 914lz is restricted to repeater LAN or switch LAN deployments,  
QSControl.net is a TCP/IP standards-compliant network system and therefore supports operation on network repeaters, switches and  
routers. When implementing the Two Wire Interface, the QSControl.net segment does not require a single topology data path and  
therefore repeaters, switches and routers may be assembled on the LAN in a hybrid fashion.  
products/network/resources.htm. To learn more about CobraNet design requirements and to obtain the CobraCAD system design utility  
All of this may seem daunting if you are new to networking. However, it all boils down to connecting a few simple cables between var-  
ious networking devices. Most of the time it "just works". QSC helped pioneer CobraNet with our RAVE ™ products and there are hun-  
dreds of installations all over the world, in theme parks, hotels, stadiums - everywhere. They run hum-free, sound great and are very  
reliable.  
The following examples will help get you started, but they just scratch the surface of what can be achieved with advanced network-  
ing…  
Example #1 - QSControl.net X-over mode:  
This is the simplest connection you can make between the BASIS 914lz and your computer. Use a CAT-5 crossover cable connected  
between the BASIS QSControl port and your computer's Network Interface Card, (NIC). No network switch is required. With QSCon-  
trol.net server and client software installed and running on your computer you will be able to completely set up and monitor your BASIS  
914lz.  
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Example #2 - CobraNet X-over mode:  
This is the simplest connection you can make between two BASIS boxes. Use a CAT-5 crossover cable connected between the Cobra-  
Net ports of each unit. No network switch is required. This connection allows audio to pass between the two BASIS boxes over Cobra-  
Net.  
Combining example 1 and 2 lets you setup and monitor one box at a time, much as you would have to do using a point-to-point RS232  
connection, while passing audio between them, all without a network switch. However, you would have to physically connect your  
computer first to one BASIS box and then to the other. With this elementary connection you don't have a true network. It is just like  
making RS-232 connections - except that performance is much better.  
All the other examples are of proper networks and all require a network switch. On a proper network, you have direct access to all  
BASIS products all of the time without having to physically switch between them. You still get the great performance of TCP/IP over  
Ethernet. (And we believe QSC's advanced 4th generation networking software provides the best performance of any networked  
audio control system available today including Ethernet based systems from competitors.)  
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Example #3 - Single Wire Interface:  
Here all QSControl.net and CobraNet traffic shares the same single CAT-5 cable between the BASIS 914lz and an unmanaged Ethernet  
switch. The QSControl.net system manages traffic flow efficiently and reliably so that all audio and control data is delivered to its  
appropriate destination anywhere on the network. Though the example shows only two BASIS 914lz units, as many devices may be  
connected as there are available switch ports. All BASIS units will be able to communicate simultaneously with the computer. All will  
have CobraNet audio. Switches can be connected to other switches to build larger networks; all of the normal networking principles  
apply. (Note: there must be at least two CobraNet devices online for any data - audio or control - to come out of the CobraNet port.)  
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Example #4 - Two-Wire Interface (shared network hardware):  
This example illustrates the Two-Wire Interface with a managed Ethernet switch. The switch is configured with multiple virtual  
local area networks (VLANs). Ethernet deliveries can only reach destination ports belonging to the same VLAN from which it was  
sourced. The figure shows a separate VLAN for QSControl.net traffic and a separate VLAN for CobraNet audio traffic. This config-  
uration essentially provides a dedicated network for BASIS 914lz control and monitoring (including the system controller) and a  
second dedicated network for CobraNet audio. As with the previous example, as many BASIS 914lz units may be connected as  
there are switch ports available. All BASIS units will be able to communicate with the computer. All will have CobraNet audio.  
Switches can be connected to other switches to build larger networks; all of the normal networking principles apply.  
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Example #5 - Two-Wire Interface (separate network hardware):  
Example #5 is conceptually similar to example #4. The difference here is that separate networks are created by providing each local  
area network (LAN) with its own network switch. Therefore, traffic segmentation is physical rather than logical. Example #5 also pro-  
vides an additional level of fault tolerance, although at the expense of additional network hardware. The figure shows a separate net-  
work switch for QSControl.net traffic and a separate network switch for CobraNet audio traffic. All of the previous comments regarding  
network expansion still apply.  
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Unpacking  
There are no special unpacking precautions. However, it is recommended you keep the original packing material for reuse in the rare  
event that service be required. If service is required and the original packing material is not available, ensure that the unit is adequately  
protected for shipment (strong box of appropriate size, sufficient packing material to prevent load-shifting or impact damage) or call  
QSCs Technical Services Department for packing material and a carton.  
What is included in the carton:  
Item  
Description  
Quantity  
1
2
3
4
5
6
7
BASIS 914lz  
1
4
1
1
1
2
10  
Self-adhesive rubber feet  
Hardware Manual (this document)  
QSControl.net Software CD  
IEC Power Cord 3 x #18 AWG  
3-pin terminal block connector  
2-pin terminal block connector  
Mounting  
The BASIS 914lz can be used in or out of an equipment rack. Rack mounting is optional. Adhesive rubber feet are included for non-rack  
mount installations. Use them to prevent the unit from scratching or marring support surfaces.  
Rack Mounting  
Rack mount the BASIS 914lz by supporting it from underneath while aligning the mounting holes with the threaded screw holes in the  
rails; install all four mounting screws and washers and tighten securely. Ensure use of all four mounting screws in order to minimize the  
chance of bending or distorting the rack mount ears. If the BASIS 914lz is to be transported while in a rack, we recommend supporting  
the rear of the chassis. This will help prevent the unit from being damaged from the increased mechanical stresses of portable and  
mobile use. The BASIS 914lz’s chassis includes integral rear mounting tabs for securing to the rack mounting ears.  
Be certain not to block the cool-  
ing air ventilation openings on  
the sides of the chassis.  
Be certain not to block  
the cooling air ventila-  
tion openings on the  
sides of the chassis.  
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Computer Requirements & Software Installation  
Installing QSControl.net is easy. All you need to do is choose the folder where the program is to be stored (the default setting is accept-  
able for most applications). We recommend your system meet the following minimum requirements:  
1- IBM PC compatible computer with a Pentium 4 processor.  
2- Processor speed of 1 GHz (2 GHz or faster recommended for systems with 30 or more BASIS/RAVE/DSP units).  
3- 512 megabytes of RAM (1 gigabyte recommended for systems with 30 or more BASIS/RAVE/DSP units).  
4- Hard drive with at least 500 MB of free space for the program and files you generate.  
5- Display resolution of 1024 X 768, 16-bit color.  
6- CD-ROM drive to install the software.  
7- 10BaseT/100BaseTx network interface card  
8- Windows XP Professional, XP Home, Windows 2000 SP2 (or better), or Windows NT4.0 SP6a operating system. Windows 95,  
98 and ME platforms are not supported.  
Note: If system is used for real-time adjustments and configuration of audio systems, we recommend all Windows Power Options  
(located in the Windows Control Panel) features be disabled. Display, hard drive, system standby and hibernation settings should be set  
to “Never”. This avoids waiting for the system to “wake-up” if adjustment is needed after an elapsed period of time.  
To Install QSControl.net:  
1- Start your computer and start Windows.  
2- If there are any programs running, please close them now. Be sure to leave Windows running.  
3- Place the QSControl.net CD-ROM in your CD-ROM drive. You can also select Start-Run and browse for the file named setup.exe  
from the CD.  
4- Click the Install QSControl.net button.  
5- Follow the installation instructions on the screen.  
To Uninstall QSControl.net:  
1- Click the Start menu button and choose Settings/Control Panel.  
2- Double-click the Add/Remove Program icon.  
3- Select QSControl.net from the list, then click Add/Remove.  
4- Click Yes to confirm you would like to uninstall QSControl.net.  
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General Information & Configuration Memories  
Amplifier Setup  
The QSC DataPort-equipped amplifiers connected to the BASIS 914lz must have their power switches in the “on” position. For initial  
testing, use the lowest useful gain setting until the system is operating as expected. After the system setup has been verified and  
tested, gain settings may be adjusted as required.  
Network  
The network should be operable and QSControl.net software should be installed/running on the system controller computer.  
CobraNet Connection Loss  
If you are operating with a valid CobraNet network, and the connection to the network is disrupted, audio will momentarily mute, allow-  
ing the BASIS 914lz to synchronize with its internal clock. If CobraNet network connection is re-established, the audio will mute again  
while the BASIS 914lz synchronizes with CobraNet.  
Configuration Memories  
The BASIS 914lz has non-volatile storage locations that contain settings for the device as well as DSP signal flow. The storage loca-  
tions make it possible to set up the BASIS for different situations and quickly recall the setup with or without QSControl.net software  
using the front panel controls.  
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Connections  
AC Power Cord  
CobraNet and QSControl  
connection. Accepts rugge-  
dized or normal shell-less  
RJ45 plugs.  
Insert the molded receptacle of the AC power cord into  
the AC power inlet on the back of the BASIS 914lz. Plug  
the AC line connector into the AC outlet. The power  
supply will accept from 100 to 240 Volts AC, 47 to 440  
Hertz, without any changes. If a different type of IEC  
power cord is required than supplied with your 914lz,  
contact QSC’s Technical Services Department.  
CobraNet  
Connect one end of a category-5 cable terminated with  
a RJ45 plug into the CobraNet receptacle. Insert the  
RJ45 plug into the receptacle with the lock-tab oriented  
toward the bottom of the BASIS 914lz and push firmly  
until the connector locks into place (usually an audible  
“click” can be heard). Connect the other end to the  
appropriate CobraNet network port.  
Analog audio input- bal-  
anced connection.  
QSControl  
Connect one end of a category-5 cable terminated with  
an RJ45 plug into the QSControl receptacle. Insert the  
RJ45 plug into the receptacle with the lock-tab oriented  
toward the bottom of the BASIS 914lz and push firmly  
until the connector locks into place (usually an audible  
“click” can be heard). Connect the other end to the  
appropriate QSControl.net network port.  
Analog Audio Inputs  
Analog audio input- unbal-  
anced connection. Note  
jumper wire between - and  
ground.  
Four balanced combo (XLR/TRS) inputs are provided, CH  
1 INPUT - CH 4 INPUT. They accept line level signals.  
Plug the input signal XLR or 1/4” TRS connectors into  
the input receptacles. Connection pin-out is printed on  
the rear label for reference. Refer to the illustrations for  
balanced and unbalanced connections. Use balanced  
audio inputs whenever possible.  
Omni In  
The two Omni In connectors are two-pin terminal block  
connectors. They accept contact closure, TTL logic sig-  
nals, 0-5 VDC control voltages, or 10k ohm variable  
resistors. The contact closure and logic devices accom-  
modate on/off or state-change events; the variable  
resistor input provides full 8-bit resolution allowing for  
incremental-change events. Refer to the illustrations for  
connection recommendations. NOTE! +48 volts is the  
absolute maximum that can be applied to the + pin  
without damage. Voltage is with respect to chassis or  
the - pin.  
Omni In connections. Vari-  
able input must be 10k ohm  
variable resistor. Contact clo-  
sure input can be a switch or  
relay contacts. These inputs  
can operate software  
“devices”. Negative (-) termi-  
nal is at chassis potential.  
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RS-232  
The RS-232 is an optional utility serial port for accessing advanced features. Connect to an  
available COM port on your PC and communicate using a terminal control program such as  
Windows Hyperterminal.  
Use a normal serial data cable with a DB-9 male plug to connect to the BASIS 914lz. To con-  
nect the cable, orient the connector properly, then push into the receptacle until it is firmly  
seated; tighten the retaining screws “finger tight”. Communications should be 9600 baud,  
no parity, 8 data bits, 1 stop bit, and flow control Xon/Xoff.  
Ports  
PORT A through PORT H are QSC DataPorts. When using the  
BASIS 914lz with QSC DataPort-equipped amplifiers or QSC  
DSP products (DSP-3, DSP-4) connect to the BASIS 914lz using  
QSC DataPort cables. The 914lz supports up to sixteen channels  
of DataPort audio and amplifier status monitoring. This can be  
eight 2-channel amplifiers or two 8-channel amplifier or other  
suitable combinations. If connecting a multi-DataPort amplifier,  
be sure to connect the DataPorts sequentially (i.e. Amp DataPort 1 to BASIS DataPort A,  
Amp DataPort 2 to BASIS DataPort B, and so on). This practice assures proper amplifier  
reporting in QSControl.net.  
To connect the cable, orient the connector properly, then push into the receptacle until it is  
firmly seated; tighten the retaining screws “finger tight”.  
LED Indicators  
When the BASIS 914lz is plugged into a properly functioning AC outlet, it will power up and  
briefly display a welcome screen on the LCD display.  
POWER Indicator- This blue indicator illuminates when the BASIS 914lz is plugged into a  
properly functioning AC source. There is no power switch on the BASIS 914lz. This helps to  
prevent accidental system shutdowns.  
DIAGNOSTIC Indicator- This red diagnostic LED reports several possible operational con-  
ditions. During boot-up, it is used to continually blink a “dot-dash” pattern if the power-on  
memory self-test fails. During normal operation, if any non-recoverable system fault occurs,  
the diagnostic indicator will remain on, requiring a power restart. If this condition persists,  
contact QSC’s Technical Services for assistance.  
The diagnostic LED is also used to indicate an update is in progress during a remote firm-  
ware update cycle. First, the LED will blink slowly, indicating the memory erase cycle, then it  
will blink rapidly, indicating the memory write cycle. NOTE! During a firmware update, it  
is critical the unit remain powered on for the entire process in order to complete  
successfully.  
The diagnostic LED may also be controlled by using the QSControl.net software. This fea-  
ture is particularly helpful for identifying a particular unit.  
(continued, next page)  
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LED Indicators (continued)  
QSControl and CobraNet Network Status (Port) Indicators- There are two groups of three LEDs on the front and rear  
panels labeled RX, TX and LINK. One group is for the QSControl.net network port and the other for the CobraNet network port.  
Their functions are described below. Note: Port indicators on rear panel are color coded to match the corresponding color-ring  
around the QSControl and CobraNet RJ45s.  
RX (receive)- This indicator illuminates any time the BASIS 914lz receives data from the corresponding network.  
TX (transmit)- This indicator illuminates whenever the BASIS 914lz transmits data onto the corresponding network.  
LINK STATUS- The corresponding indicator illuminates when the BASIS 914lz is connected to an operating network.  
PORTS indicators- These indicators are labeled A through H. These indicators are either off, red, green, or yellow, depend-  
ing on what is connected to the port. The indications are:  
off- nothing attached  
red- QSC DSP accessory attached  
green- QSC DataPort amplifier attached  
yellow- QSC DSP accessory and Amplifier combination attached  
LCD Display and Controls  
The BASIS 914lz has a 2 line X 16 character LCD display. The display and the multi-function push-button switches on either  
side provide data access and editing capability. The push-button switches on either side of the display are used to navigate  
through the menus. The rotary select/accept knob is active for many displayed items allowing you to scroll through choices by  
rotating the control, and accepting choices (entering) by pushing in on the control.  
The accessible menus and sub menus may appear differently than example shown. Software updates may occasionally  
improve the interface. Below is a the basic navigation flow for the BASIS 914lz menu system.  
Front Panel Password Lockout  
The password lockout provides the ability to restrict access to all of the editable parameters available on the LCD front panel.  
This feature is enabled or disabled via QSControl.net software only (refer to the “General Tab” area and click on the “Front  
Panel Password” button). when the lockout feature is enabled, all front panel LCD functions are readable, but editing of  
parameters is now password protected. While in this mode, any attempt to edit a parameter will require the user to enter the  
Front Panel Password. The default factory password is “qsc”. The password is stored in the BASIS unit and can be changed  
using the QSControl.net software.  
Once the password has been correctly entered, the BASIS will allow edits to the parameters.  
After 5 minutes of inactivity, the BASIS will automatically reset the Front Panel Password lockout.Re-entry of the password  
will be required to resume editing.  
The lockout mode can be deliberately disabled via the “Disable Edits” screen in the Front Panel Password menu of the  
QSControl.net software.  
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Use rotary data wheel to edit data. Rotate to  
move cursor and push to accept change.  
LCD Navigation Map  
Boot Screen  
Left side buttons have screen dependent functions.  
This read-only screen is the “out of the box” default  
display after power up. This is the most desired infor-  
mation when first setting up a network system. Once  
user moves to a different screen, the last screen  
accessed becomes the new power up default.  
Right side buttons serve as up/down  
navigation.  
Arrow characters indicate right side  
button context. If additional menus  
are available, the arrow character  
will be shown.  
*Note: After successful password entry,  
all screens with editable parameters will  
have read write capability. Without pass-  
word entry, these screens will be read-  
only.  
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Getting Started  
This section outlines one of the simpler methods of getting familiar with your BASIS and the QSControl.net software. The goal of this  
procedure is to get your computer and the BASIS connected and communicating and the QSControl.net software installed and running.  
After the software is installed and running, refer to the software’s Help file for all software related operation/issues. Note! The default  
password for the BASIS is “qsc” (no quotes, lower case).  
1- Turn off the computer and unplug the power cord from the BASIS 914lz.  
2- Connect a CAT-5 crossover cable from the computer’s network interface card (NIC) to the BASIS QSControl jack (example 1, page 6).  
3- Reconnect the power cord to the BASIS 914lz (turn it on). Using the BASIS LCD display and controls, navigate the menu to the IP  
Address and make a note of it. In steps 12 and on, you will need to change the IP address of the BASIS or your PC.  
4- Turn on the PC and start Windows. You must have Administrator rights and be signed on as Administrator in order to install the  
QSControl.net program. Ensure you are signed on to the computer as the Administrator.  
5- Place the QSControl.net CD-ROM in your CD-ROM drive. The install wizard should start. If not, you can also select Start, then Run  
and browse for the file named setup.exe from the CD.  
6- The installer queries the computer for available drive space and other information. If required MDAC library (Microsoft) files are not  
already on the computer, the library files are installed. You must accept the Microsoft software agreement in order to install the MDAC  
library. It may be necessary to reboot the computer after library installation.  
7- At the prompt for “Client/Server” selection, keep both Client and Server selected. This will be appropriate for general use.  
8- When prompted “Select Installation Folder”, specify the installation directory or accept the default location.  
9- You will be prompted to select an installation accessible by everyone (non-secure) or an installation accessible only to you (secure).  
Select the appropriate Everyone or Just Me box and continue. Installation proceeds.  
10- Reboot only if your computer prompts you to do so.  
11- Select Network Connections in the control panel. Select Properties. Right-click Local Area Connection, and view its proper-  
ties. Highlight the Internet Protocol (TCP/IP) tab and view its properties. You will see an entry field for the IP address. Decide  
whether you want to change the IP address of your computer to be similar that of to the BASIS (easiest if you have many BASIS units)  
or if you want to change the IP address of your BASIS to be similar to that of the computer. This is a network management decision.  
12- Change the IP address of the BASIS (or computer) to be compatible with that of the computer (or BASIS). Typically, this is done by  
making the IP address of one of the devices 1 digit different in the last octet (group of digits in IP address). If changing the computer’s  
settings, write down the current values, in case you want to revert later.  
13- The subnet mask address should be exactly the same for both the computer and the BASIS. The Gateway address should not be  
altered as it is not used.  
14- After you are satisfied with all your settings, close all open windows and start the QSControl.net program. Select Start, All Pro-  
grams, QSControl.net, Venue Manager.  
15- The login screen should open. The default password is “qsc” (lower case, no quotation marks). Select “Log on to Local Computer”  
and click OK.  
16-The QSControl.net Venue Manager window will open. A Startup Tips screen will be visible the first time Venue Manager is  
launched. Optionally, the Startup Tips screen may be disabled by un-checking the box in it’s lower left corner. It is highly recom-  
mended the user become familiar with each of the tips listed on this screen. After reviewing the tip(s), close the Startup Tips screen.  
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Getting Started (continued)  
17- Select Device, Add Device, from the menu. A new window will open prompting you to name the device. Name it logically, such  
as BASIS 1, or similar. Select the Device Type and select BASIS 914lz. At the Password prompt, enter “qsc” (lower case, no quotation  
marks). This is the device password, separate from the software password. The default, in both cases, is “qsc”, but you are free to  
change either or both. Enter the IP address of the BASIS and click OK.  
18- The BASIS will now appear in the inventory root (left side of screen, first with a red “x”, then a yellow exclamation point, then a  
normal icon). If the BASIS does not eventually show in the inventory root, check that a crossover cable is used (only for BASIS con-  
nected directly to PC), check the cable connections, verify IP addresses are set correctly, verify Subnet masks are set correctly, and ver-  
ify AC power is properly applied to the BASIS.  
19- Click on the “+” sign of the BASIS 914lz in the inventory root, then the “+” sign of the Flashed Configs. Click on the config with the  
loudspeaker icon. A view of applicable device tabs will open. Click the DSP block and the current DSP configuration of the BASIS will  
be displayed. Default DSP routing is Analog Inputs 1-8 are routed to DataPorts 1-4, with each DataPort assigned 2 sequential channels  
(i.e. Analog Inputs 1 and 2 are routed to DataPort A, Inputs 3 and 4 are routed to DataPort B, etc....).  
20- Right click on the Design Editor icon in the lower left of your display; select “New”. A new window opens; select BASIS 914lz for  
the device type.  
21- Click on Help to access the software’s Help system. All software operation is covered in the on-line help file.  
Operation of the BASIS 914lz is accomplished with the included QSControl.net software. No soft-  
ware operation is covered in this hardware manual. After installing your software, open the Help file  
and follow its recommendations. The software Help file includes the most recent information avail-  
able for your BASIS 914lz.  
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Operation  
QSControl Port  
The QSControl port operates on a 10BaseT Ethernet network. This port is one of the primary means for connecting QSControl.net to the  
BASIS. The port may connect directly to a PC's 10BaseT or 10/100 (auto-sensing or auto-negotiating) network interface card using a  
crossover cable. Data from the QSControl port may also pass through network repeaters, network switches and routers. We strongly  
recommend the use of network switches to facilitate higher bandwidth and dedicated connections.  
CobraNet Port  
The CobraNet port operates on a dedicated 100BaseTx (Fast Ethernet) network. The CobraNet port may connect directly to a PC's  
100BaseTx or 10/100 (auto-sensing or auto-negotiating) network interface card using a crossover cable for the purposes of configura-  
tion when the BASIS 914lz is in the single-wire interface mode. During normal operation (passing audio) the CobraNet port must con-  
nect to a 100BaseTx or 10/100 or 10/100/1000 (auto-sensing or auto-negotiating) switch port. Optionally, the BASIS 914lz may connect  
to another CobraNet port using a crossover cable. When the BASIS 914lz is operating in the two-wire interface mode (described in fol-  
lowing sections), the CobraNet port may be connected to a network repeater. Regardless of the interface mode, all CobraNet audio data  
must pass through only network switches or only network repeaters. Combinations of these devices will cause unreliable operation and  
are not supported. Likewise, the use of routers, gateways and ATM devices are not supported for the CobraNet audio path.  
CobraNet Channel Density  
The BASIS 914lz will support the acquisition of up to 32 channels via up to 4 inbound bundles (from the network). Of these 32 channels,  
any 16 may be selected to forward to the signal processing chain (DSP engine).  
The BASIS 914lz will support the delivery of up to 32 channels via up to 4 outbound bundles (to the network). Of these 32 channels, up  
to 24 may be unique (processed individually... or the result of mixed signals from the DSP engine). The remaining 8 channels (if used)  
will be copies of other channels.  
CobraNet Channel Resolution  
All CobraNet audio will be processed internally within BASIS 914lz at 24-bit resolution. The BASIS 914lz may receive any valid resolu-  
tion off of the network. This is currently 16-bit, 20-bit and 24-bit. Audio via inbound bundles may be in any combination of these resolu-  
tions and the BASIS will process the data accordingly. All DACs will process 24-bit audio, though the least significant bits may be zero  
filled if the inbound audio format is less than 24-bit resolution.  
The BASIS 914lz will support outbound (sourced onto the network) resolutions of 16-bit, 20-bit and 24-bit. The default outbound resolu-  
tion is 20-bit.  
CobraNet Terms and Conditions  
Single-wire interface offers the best efficiency and ease of network configuration for most applications. The single-wire interface  
requires fewer network ports and less cabling. Single-wire interface refers to CobraNet audio, CobraNet control and monitoring and  
QSControl.net control and monitoring using the same network connection. This mode uses the CobraNet connection to provide all data  
communications to the BASIS product. In this mode, the port must connect to a 100BaseTx or 10/100 or 10/100/1000 (auto-sensing or  
auto-negotiating) link partner. Network repeaters will not be supported and all audio must pass through network switches only. A  
QSControl.net Venue Manager PC may connect to the network via a repeater or router.  
Two-wire or dual-wire interface offers the greatest versatility in network design. Separate connections allow discrete networks  
and offer support for WAN topologies on the QSControl.net-side. Two-wire or dual-wire interface refers to CobraNet audio having a  
dedicated network link and QSControl.net control and monitoring having a dedicated network link. In this mode, the two ports (Cobra-  
Net and QSControl.net) must be connected to separate networks. By separate networks, we mean either physically separate hardware  
or the use of common hardware with partitioned or segmented network domains such as the use of VLANs. The dual-wire interface  
may support dissimilar network hardware for the two port connections (see rules above for CobraNet and QSControl port connections).  
1 Minute Autosave Timer and Power Cycling  
The active configuration has a special feature associated with it. Any changes made to a parameter during operation will start an inter-  
nal timer which will trigger an automatic save of the configuration data. The save procedure begins after 1 minute of parameter change  
inactivity. If the BASIS 914lz is then power cycled, upon restart, the previous settings data will be preserved in the active configuration.  
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Utility/Diagnostic Functions  
Safe Mode Switch  
Location of Safe Mode switch: The front panel has a small access hole on the left side, just left of the Power indicator. It is not  
labeled to help prevent accidental use. The Safe Mode switch can be operated by using a paper-clip (or similar item) inserted into  
the access hole and pushing.  
Safe Mode: Use if the BASIS 914lz becomes inoperable (or behaves in completely unexpected ways) after updating  
firmware.  
If the BASIS 914lz operates in an unexpected way or is not responding to any communications after a new firmware file is  
uploaded to it, it is likely the file was corrupted during transfer. If this occurs, there is a “backup” program in the BASIS 914lz that  
will enable you to communicate with it.  
How to put the BASIS 914lz into Safe Mode:  
1- Turn off the power to the BASIS 914lz by unplugging it from the AC outlet.  
2- Depress the safe mode switch and keep it depressed while plugging the unit back in (power on).  
3- The BASIS 914lz is now in “safe mode”. You may release the switch.  
You should now be able to re-establish limited TCP/IP communications with the BASIS 914lz. Once communication has been re-  
established, the file transfer can be tried again or the old application file used until the source of the data transfer problem can be  
found. Also, QSControl.net WILL NOT communicate with the BASIS 914lz if it is in “safe mode”. You may communicate only using  
TFTP, Telnet, or RS-232.  
RS-232 Serial Port I/O Interface  
The RS-232 connector on the rear panel is used as a serial port input/output (I/O). This I/O port is used for accessing Ethernet/IP  
settings, stand alone control capabilities, system “health” data, firmware version information and other related data.  
Should any system problems arise, the data that may be accessed through this interface can help to track down the problem. The  
most common items that might be used are “Display Network Settings” and “Enter Network Setup”. Many of the remaining selec-  
tions would typically be used for troubleshooting purposes along with a QSC technical representative prompting you to access par-  
ticular menu items so the data can be interpreted.  
Connection is made using a normal serial cable between your computer’s serial port and the RS-232 port of the BASIS 914lz. Once  
properly connected, a “dumb-terminal” program (such as Hyper Terminal, a widely used version on most Windows-based PCs) is  
started and communication established between the PC and the BASIS 914lz.  
Following is the basic procedure for starting up Hyper Terminal, naming the connection, specifying the communications settings  
and an example of “what you should see” for a text-menu once the communications link has been established. If programs other  
than Hyper Terminal are used, you will need to follow your software’s instructions for establishing communications through your  
PC’s COM (serial) port.  
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Utility/Diagnostic Functions (continued)  
RS-232 Communications Procedure:  
1) Connect the RS-232 port of the BASIS 914lz to an unused serial port (COM port) of a PC using a normal (straight-through) serial  
cable.  
2) Open the HyperTerminal program. This program is usually started by clicking the Windows START icon, highlighting PROGRAMS,  
then ACCESSORIES, COMMUNICATIONS, and finally, highlighting the Hyper Terminal folder and clicking on its icon.  
3) After starting Hyper Terminal, a Connection Description window will pop-up. It will require that you name your connection. Enter a  
name for your new connection (example: BASIS 914lz) and click OK to continue.  
4) Next, Hyper Terminal needs to know how to “talk” to the BASIS 914lz. This selection depends on which port on your PC the cable is  
connected to. Ignore the first three entry fields (phone number information) and go directly to the “Connect using:” entry field and click  
on the down arrow for the drop-down menu selection. Select the port the BASIS 914lz is connected to and click OK to continue. The  
Properties window should appear next.  
5) The Properties window for the selected COM port should now be active.  
For the Port Settings, use the following information so communication between the BASIS 914lz and the computer is in the same  
“language”.  
Bits per Second: 9600  
Data Bits:  
Parity:  
Stop Bits:  
Flow Control:  
8
none  
1
Xon/Xoff  
Once you have set the properties as outlined, click OK to continue.  
If all the connections and communications settings are correct, the main Hyper Terminal window will open.  
6) The Hyper Terminal main window will appear next, but blank. Type the letter “h” (for help) and then the “Enter” key. This will prompt  
the BASIS 914lz to post its menu text. The “h” key is the Help prompt for the BASIS 914lz. A text menu will appear. This is sent by the  
BASIS 914lz and will detail your options and instructions for changing the address information.  
From this main-menu you will need to make your menu choices and follow the instructions in the following sub-menus or screens.  
Although many of the instructions and tests may not pertain to a specific setup or troubleshooting situation, you may be asked to run  
certain tests by a QSC technical representative. The results of these tests will help to troubleshoot any problems.  
The most common user item that might require settings to be changed would be the IP address information. This would be useful if the  
IP address was inadvertently changed to an unrecognized address and subsequently you were unable to “talk” to the BASIS 914lz over  
the network. This situation would require the “Display Network Settings” and “Enter Network Setup” items to be accessed for re-  
assigning a valid IP address.  
IP ADDRESS ASSIGNMENT- ONLY REQUIRED FOR ATTACHING TO EXISTING NETWORKS! DO NOT CHANGE THE COM-  
MUNICATIONS SETTINGS OF THE BASIS 914lz UNLESS CERTAIN OF YOUR ACTIONS. THE FACTORY-PROGRAMMED IP  
ADDRESS CAN BE ACCESSED USING THE FRONT PANEL DISPLAY MENU SYSTEM. RECORD THIS IP ADDRESS SHOULD  
YOU NEED TO RETURN TO THE INITIAL SETTINGS.  
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Utility/Diagnostic Functions (continued)  
Telnet Access  
The RS-232 features can also be accessed via Telnet. The Microsoft Telnet application is a Windows program. Consult Windows  
documentation for Telnet information.  
Basic procedure for opening a Telnet session:  
1- To open the Telnet session- Click START, select RUN, type “Telnet” followed by a space, then the IP address of the BASIS 914lz  
you want to communicate with in the text box and click OK.  
2- If the address entered was correct and network communications with the BASIS 914lz are successful, the Telnet session should  
open.  
3- Now you have the same options that are available in the Serial Port I/O (RS-232) interface section.  
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Preliminary Specification  
IN  
Dynamic Range (AES-17, -60dB Method, all sensitivities)  
OUT  
THRU  
unweighted  
A weighted  
>112dB  
>115dB  
>112dB  
>115dB  
>110dB  
>113dB  
Distortion (20Hz-20 KHz, all sensitivities)  
+4dBu (max.)  
<0.009% THD+N  
<0.009% THD+N  
<0.009% THD+N  
<0.009% THD+N  
<0.009% THD+N  
<0.009% THD+N  
2dB below clip (max.)  
Crosstalk (20Hz - 20KHz)  
inter-channel (max)  
inter-channel (typ)  
>75dB  
>90dB  
>85dB  
>100dB  
intra-channel (max)  
intra-channel (typ)  
Frequency Response  
20Hz - 20KHz (max)  
20Hz - 20KHz (typ)  
+/- 0.5dB  
+/- 0.2dB  
Program Inputs  
Connector Type  
Type  
4
XLR/TRS combo  
Electrically balanced  
Grounding  
Pinout  
Shell and shield terminals connected to chassis  
1/Tip:+ 2/Ring:- 3/Sleeve: shield  
Input Impedance (nom.)  
Common-Mode Rejection  
Input Sensitivities (variable)  
Balanced: 10K ohms  
20Hz - 20KHz (min)=: >54dB, 20Hz - 20KHz (typ): >60dB  
: 1.5, 3, 9, 18 / dBu: 5.7, 11.8, 21.3, 27.3 / dBV: 3.5, 9.5, 19.1, 25.1  
Unbalanced: 10K ohms  
V
rms  
Program Outputs  
Connector Type  
16  
8 HD-15 dataport connections  
Cable Type  
Available “stock” Lengths  
Maximum Qualified Length  
QSC DataPort cable, QSC p-n DPC-x (“x” designates cable length in feet)  
1, 2, 3, 4, 5, 6, 10, and 20 ft., custom lengths available.  
328 ft. (100 m) QSC DataPort cable only. Non-QSC cable, 6 ft (2 m) max.  
Audio Converters  
Mute  
24 bit, 48KHz, in and out  
infinite attenuation  
Delay  
Standard CobraNet Latency  
Low Latency  
BASIS to Network  
Analog input through full DSP chain to CobraNet output 7.104 milliseconds  
Network to BASIS  
CobraNet input through full DSP chain to analog output 6.313 milliseconds  
BASIS to BASIS  
4.438 milliseconds  
3.646 milliseconds  
Analog input through full DSP chain, over CobraNet network,  
through full DSP chain, to analog outputs  
BASIS in stand-alone mode  
8.083 milliseconds  
5.417 milliseconds  
Analog input through full DSP chain to analog outputs  
2.354 milliseconds (Default Group Delay)  
Specifications are subject to change without notice.  
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Preliminary Specification  
Omni Inputs  
2 discrete inputs for TTL logic, voltage control or passive resistive  
2-pin "Phoenix Style" (a.k.a. "Euro Style") detachable terminal blocks  
Single-ended, ground referenced  
Connector Type  
Configuration  
Pinout  
1:+(Signal) 2:-(CHASSIS GND)  
Normal Operating Range  
Potentiometer Operation  
Voltage Tolerance  
Current Output  
Reads signals between 0-5V nominally  
Use 10K for full range  
+/- 48V  
0.5mA with 10K pot (for passive resistive controls)  
RS-232 Port  
QSControl.net  
CobraNet  
Female DB9 Connector  
Neutrik Ethercon RJ45 Ruggedized Data Connector  
Neutrik Ethercon RJ45 Ruggedized Data Connector  
Indicators  
QSControl.net Status  
CobraNet Status  
Power  
Yellow Link, Tx, Rx, front panel / Green Link, Tx, Rx, rear panel  
Yellow Link, TX, RX, front and rear panel  
Blue, front panel  
Diagnostic  
Red, front panel  
DataPort Status (Port)  
LCD Data Display  
Tri-state (red, green, yellow), front panel  
2 line x 16 character, backlit, front panel  
Dimensions  
Weight  
18.89” (479.8mm) W x 1.73” (43.9mm) H x 15.00” (381.1mm) D  
10.70 lb. (4.85 kg)  
Specifications are subject to change without notice.  
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Dimensions  
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How to Contact QSC Audio Products  
Mailing address:  
QSC Audio Products, Inc.  
1675 MacArthur Boulevard  
Costa Mesa, CA 92626-1468 USA  
Telephone Numbers:  
Main Number  
(714) 754-6175  
Sales & Marketing  
Customer Service  
(714) 957-7100 or toll free (USA only) (800) 854-4079  
(714) 957-7150 or toll free (USA only) (800) 772-2834  
Facsimile Numbers:  
Sales & Marketing FAX  
Customer Service FAX  
(714) 754-6174  
(714) 754-6173  
World Wide Web:  
E-mail:  
Warranty Disclaimer (USA only; other countries, see your dealer or distributor)  
QSC Audio Products, Inc. is not liable for any damage to amplifiers, loudspeakers, or any other equipment that is caused by negligence  
or improper installation and/or use of this signal processing product. While QSC has endeavored to develop and produce the most  
dependable and robust 'network' audio product for your use, due to the myriad of network situations and equipment that may be  
encountered in its implementation, QSC cannot be held responsible for network conflicts and associated consequences that may result.  
For this reason, QSC strongly recommends that the network used for implementation of QSControl products be completely separate  
from all other networks, data or otherwise. As such, should you elect to integrate QSControl products with your existing network sys-  
tem, all risks attendant to such integration of QSControl products with your existing network or network systems are assumed by you.  
While QSC strives to provide the highest quality technical solutions for networked audio products, in no event will QSC or its suppliers  
be held liable for any damages, consequential, incidental or otherwise, including any claims for lost profits and/or savings resulting  
from any attempted integration of QSControl products with your networking systems. No agent, employee or representative of QSC has  
any authority to alter or modify in any manner, the disclosures and recommendations set forth herein.  
QSC Audio Products 3 Year Limited Warranty  
QSC Audio Products, Inc. ("QSC") guarantees its products to be free from defective material and / or workmanship for a period of three  
(3) years from date of sale, and will replace defective parts and repair malfunctioning products under this warranty when the defect  
occurs under normal installation and use - provided the unit is returned to our factory or one of our authorized service stations via pre-  
paid transportation with a copy of proof of purchase (i.e., sales receipt). This warranty provides that the examination of the return prod-  
uct must indicate, in our judgment, a manufacturing defect. This warranty does not extend to any product which has been subjected to  
misuse, neglect, accident, improper installation, or where the date code has been removed or defaced. QSC shall not be liable for inci-  
dental and/or consequential damages. This warranty gives you specific legal rights. This limited warranty is freely transferable during  
the term of the warranty period.  
Customer may have additional rights, which vary from state to state.  
In the event that this product was manufactured for export and sale outside of the United States or its territories, then this limited war-  
ranty shall not apply. Removal of the serial number on this product, or purchase of this product from an unauthorized dealer, will void  
this limited warranty.  
QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA  
©2005 “QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office.  
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