CXD-Q Amplifiers
User Manual
CXD4.2Q — 4 Channel, 1600 W Amplifier
CXD4.3Q — 4 Channel, 2500 W Amplifier
CXD4.5Q — 4 Channel, 5000 W Amplifier
(DRAFT — September 17, 2014)
TD-000438-00-A
*TD-000438-00*
1 (DRAFT 2014/08/09)
EXPLANATION OF SYMBOLS
The term “WARNING!” indicates instructions regarding personal safety. If the instructions are not followed the result may be bodily injury or death.
The term “CAUTION!” indicates instructions regarding possible damage to physical equipment. If these instructions are not followed, it may result in
damage to the equipment that may not be covered under the warranty.
The term “IMPORTANT!” indicates instructions or information that are vital to the successful completion of the procedure.
The term "NOTE" is used to indicate additional useful information.
The intent of the lightning flash with arrowhead symbol in a triangle is to alert the user to the presence of un-insulated "dangerous"
voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans.
The intent of the exclamation point within an equilateral triangle is to alert the user to the presence of important safety, and operating
and maintenance instructions in this manual.
IMPORTANT SAFETY INSTRUCTIONS
WARNING!: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
• Keep these instructions.
• Heed all warnings.
• Follow all instructions.
• Do not use this apparatus near water or liquids.
• Do not submerge the apparatus in water or liquids.
• Clean only with a dry cloth.
• Do not use any aerosol spray, cleaner, disinfectant or fumigant on, near or into the apparatus.
• Do not block any ventilation opening. Install in accordance with the manufacturer's instructions.
• Keep ventilation opening free of dust or other matter.
• 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.
• Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from
the apparatus.
• Only use attachments/accessories specified by the manufacturer.
• Unplug this apparatus during lightning storms or when unused for long periods of time.
• Inspect the apparatus for signs of external wear and tear or signs of damage. All damage to the apparatus should be immediately repaired by a
QSC authorized service station or QSC International Distributor. Failure to perform necessary repairs could lead to additional damage or to safety
hazards. Failure to perform necessary repairs voids the limited warranty and QSC is not responsible for any injury, harm or related damages arising
from any failure to perform those repairs.
• 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.
• The appliance coupler, or the AC Mains plug, is the AC mains disconnect device and shall remain readily operable after installation.
• Adhere to all applicable, local codes.
• Consult a licensed, professional engineer when any doubt or questions arise regarding a physical equipment installation.
2 (DRAFT 2014/08/09)
FCC Statement
For CXD-Q 4.3 and CXD-Q 4.5
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his
own expense.
For CXD-Q 4.2
NOTE: 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 a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference 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.
RoHS STATEMENT
The QSC CXD4.2Q , CXD4.3Q , and CXD4.5Q amplifiers are in compliance with European Directive 2002/95/EC – Restriction of Hazardous
Substances (RoHS).
The QSC CXD4.2Q , CXD4.3Q , and CXD4.5Q amplifiers are in compliance with “China RoHS” directives. The following chart is provided for product
use in China and its territories:
QSC CXD4.2Q , CXD4.3Q , and CXD4.5Q Amplifiers
部件名称
(Part Name)
有毒有害物质或元素
(Toxic or hazardous Substances and Elements)
铅
(Pb)
汞
(Hg)
镉
(Cd)
六价铬
(Cr(vi))
多溴联苯
(PBB)
多溴二苯醚
(PBDE)
电路板组件
(PCB Assemblies)
X
O
O
O
O
O
机壳装配件
(Chassis Assemblies)
X
O
O
O
O
O
O: 表明这些有毒或有害物质在部件使用的同类材料中的含量是在 SJ/T11363_2006 极限的要求之下。
(O: Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for this part is below the limit requirement
in SJ/T11363_2006.)
X: 表明这些有毒或有害物质在部件使用的同类材料中至少有一种含量是在 SJ/T11363_2006 极限的要求之上。
(X: Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials used for this part is above the
limit requirement in SJ/T11363_2006.)
Warranty
For a copy of the QSC Limited Warranty, visit the QSC Audio Products website at www.qsc.com
Para una copia de la Garantía Limitada de QSC, visite el sitio web de QSC Audio Products, en www.qsc.com
Pour obtenir une copie de la garantie limitée de QSC, visitez le site de QSC Audio Products à www.qsc.com
Besuchen Sie die Webseite von QSC Audio Products (www.qsc.com) um eine Kopie der beschräenkte Garantie von QSC zu erhalten.
如果想要QSC 有限保修的複印本,造QSC 音品的网站www.qsc.com
3 (DRAFT 2014/08/09)
Rack-Mount the Amplifier
1. Secure the amplifier in the rack with eight screws (not supplied), four in front, four in back.
— Figure 1 —
Unpacking
There are no special unpacking instructions. You may want to keep the shipping material for the unlikely event that the amplifier should need
returning for service.
Package Contents
1. Quick-Start Guide TD-000350-00
5. Euro-style Connector Plug, 3-pin (4)
2. Warning Information Sheet TD-000420-00
6. Euro-style Connector Plug, 8-pin (1)
3. CXD-Q Amplifier
7. Euro-style Connector Plug, 3.5 mm, 2-pin (1)
4. IEC AC Power Cord
8. Euro-style Connector Plug, 3.5 mm, 3-pin (1)
4 (DRAFT 2014/08/09)
Features
Amplifier Front Panel
1
A
CXDQ
2
3
4
5
6
7
8
9
10
11
MUTE
B
OUTPUT
MUTE
NETWORK
AMPLIFIER
C
MUTE
12
D
NEXT
MUTE
GAIN
13
LIM
-10
PREV
14
15
ID
16
17
-20
SEL
SEL
SEL
SEL
CLIP
SIG
2 INPUT 3
1
FAULT
4
— Figure 2 —
1. Output channels are labeled A, B, C, and D
10. Input Channel Signal-Present LEDs (Blue)
2. Output Channel Mute Buttons and LEDs (Red)
11. Input channels are labeled 1, 2, 3, and 4
3. Output Channel Limiter LEDs (Red)
12. LCD Graphic Display
4. Output Channel -10 dB below maximum amplifier output (Blue)
13. NEXT Button
5. Output Channel -20 dB below maximum amplifier output (Blue)
14. PREV Button
6. Soft Power Button (Green/Red)
15. MASTER CONTROL Knob
7. Channel Select Buttons and LEDs (Blue for Output)
16. ID Button
8. Input Channel Clip LEDs (Red)
17. Pinhole Reset
9. FAULT LED
Amplifier Rear Panel
NOTE: The CXD4.3Q , and CXD4.5Q models have a different rear panel configuration than the CXD4.2Q amplifier. The difference is
that the position of the fan and the eight-pin Euro-style connector and associated information are interchanged.
1
2
LAN A LAN B
3
ROUTABLE INPUTS
1
2
4
3
4
+
+
CH B
+
CH C
+
CH D
CH A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
5
CH AB
T1+ T2T3+ T4-
T1
T2
CH CD
T5+ T6T7+ T8-
T3
T4
T5
CH A+B
T1+ T3-
T6
CH C+D
T5+ T7-
T7
T8
CH AB+CD
T1+ T5T3+ T7-
CH ABC
T1+ T2T3+ T4T5+ T6CH ABCD
T1+ T2T3+ T4T5+ T6T7+ T8-
— Figure 3 —
1. RJ-45 Q-Sys Q-LAN A/B
6. AC Power Switch
2. GPIO Euro-style Connector, 16-pin
7. Locking IEC Power Connection
3. Inputs - Four three-pin Euro-style Connectors
8. Rear Rack-mount Bracket
4. One eight-pin Euro-style Loudspeaker Connector
9. Front Rack-mount Brackets
5. Cooling fan
5 (DRAFT 2014/08/09)
6
7
8
9
Connections
LAN A LAN B
Q-Sys Q-LAN
Connect the amplifier LAN A, and if available, LAN B, to the Q-LAN network. (Figure 4) Refer to your Q-Sys documentation for
network requirements and connection detail.
— Figure 4 —
Unbalanced
Balanced
Inputs
The analog inputs are converted to digital audio in the CXD-Q amplifiers and then routed to the Q-Sys
Core over the network. The digital signals show up in Q-Sys Designer at the CXD-Q input component
where they can be routed as needed. Refer to the Q-Sys documentation.
—
1. Wire the audio mic- or line-level source to up to four Euro-style connectors (supplied). You may use
either balanced inputs (Figure 5) or unbalanced inputs (Figure 6). Adjust input sensitivity in Q-Sys
Designer.
2. Plug the connectors into the appropriate receptacles (Routable Inputs 1, 2, 3, 4) Figure 7.
+
+
—
— Figure 6 —
— Figure 5 —
ROUTABLE INPUTS
1
2
3
4
WARNING!: Do not turn the amplifier on at this time.
3. Connect the IEC power cord to the AC receptacle on the rear of the amplifier. (Figure 8)
— Figure 7 —
GPIO
Figure 9 shows the GPIO connector, refer to "GPIO" on page 11 for details about using the GPIO.
1
2
3
4
5
6
7
8
Outputs and Configuration
The configuration of the amplifier and the amplifier component in the Q-Sys design file must match.
Double check that these are identical and if necessary change the configuration by following the
instructions on the front panel of the amplifier. When the output configuration of the amplifier changes,
the Outputs to the loudspeakers change accordingly. Use the diagrams shown in Figure 10 thru Figure 12
as a reference for wiring the loudspeakers.
— Figure 8 —
9
10
11
12
13
14
15
16
— Figure 9 —
CAUTION!: Before turning the amplifier on, double check your output connections to be sure they are connected properly based on
the output configuration specified in Q-Sys Designer. After connecting the outputs to the loudspeakers, you may turn the amplifier on.
Figure 10 through Figure 13 are examples of the three types of output configurations: Separate, Bridged and Parallel. The tables to the right of the
loudspeaker connections give all the possible configurations and their connections.
Separate Channels (A B C D)
OUTPUTS TO SPEAKERS
For Four Separate Loudspeakers
Use four 2-wire cables, connect to:
• T1+/T2- (Loudspeaker 1)
• T3+/T4- (Loudspeaker 2)
• T5+/T6- (Loudspeaker 3)
• T7+/T8- (Loudspeaker 4)
+
+
CH B
+
CH C
+
CH D
CH A
CHANNEL CONFIGURATION
Q A
Q B
Q C
Q D
4 Channels: A B C D
Channel Configuration Locked to Design
— Figure 10 —
6 (DRAFT 2014/08/09)
T1
T2
T3
T4
T5
T6
T7
T8
PARALLEL CHANNEL
COMBINING APPLICATIONS
CH AB
T1+ T2SETTINGS CAN BE
T3
+ T4CONFIGURED FOR
70V, 100V AND
200V DIRECT
OUTPUT.
BRIDGED
CH A+B
T1+ T3-
CH C+D
T5+ T7CH AB+CD
T1+ T5T3+ T7-
CH CD
T5+ T6T7+ T8CH ABC
T1+ T2T3+ T4T5+ T6CH ABCD
T1+ T2T3+ T4T5+ T6T7+ T8-
Bridged (A+B) and Separate (C D) Channels
For A+B (Bridged) One Loudspeaker
OUTPUTS TO SPEAKERS
Use one 2-wire cable connect to:
• T1+/T3-
+
+
CH B
+
CH C
+
CH D
CH A
For C & D (Separate) Two Loudspeakers
Use two 2-wire cables connect to:
• T5+/T6- for CH C
• T7+/T8- for CH D
CHANNEL CONFIGURATION
Q A+B
Q C
Q D
T1
T2
T3
PARALLEL CHANNEL
COMBINING APPLICATIONS
CH AB
SETTINGS CAN BE
T1+ T2CONFIGURED FOR
T3
+ T470V, 100V AND
200V DIRECT
OUTPUT.
BRIDGED
T4
CH A+B
T1+ T3-
T5
CH C+D
T5+ T7-
T6
CH AB+CD
T1+ T5T3+ T7-
T7
T8
CH CD
T5+ T6T7+ T8CH ABC
T1+ T2T3+ T4T5+ T6CH ABCD
T1+ T2T3+ T4T5+ T6T7+ T8-
3 Channels: A+B C D
Channel Configuration Locked to Design
— Figure 11 —
Parallel Channels (ABCD)
For One Loudspeaker
OUTPUTS TO SPEAKERS
Full power to one loudspeaker
Use one 2-wire cable, connect to:
• T1+/T2• Jumper T1, T3, T5, T7
• Jumper T2, T4, T6, T8
+
+
CH B
+
CH C
+
CH D
CH A
For Multiple Loudspeakers
Full power for multiple loudspeakers in parallel
Use up to four 2-wire cables, connect to:
• T1+/T2CHANNEL CONFIGURATION
• T3+/T4• T5+/T6Q ABCD
• T7+/T81 Channel: A B C D
Channel Configuration Locked to Design
T1
T2
T3
SETTINGS CAN BE
CONFIGURED FOR
70V, 100V AND
200V DIRECT
OUTPUT.
T4
T5
T6
T7
T8
T1+, T3+, T5+, and T7+ are electrically the same point
T2-, T4-, T6-, and T8- are electrically the same point
— Figure 12 —
Connect the Loudspeakers
1. Connect the loudspeaker wiring to the 8-pin Euro-style connector as needed for
your amplifier's configuration.
2. Install the female 8-pin Euro-style connector onto the male connector on the rear of
the amplifier as shown in Figure 13.
3. Use a Phillips screwdriver to secure the connector.
— Figure 13 —
7 (DRAFT 2014/08/09)
BRIDGED
CH A+B
T1+ T3-
CH C+D
T5+ T7CH AB+CD
T1+ T5T3+ T7-
PARALLEL CHANNEL
COMBINING APPLICATIONS
CH AB
T1+ T2T3+ T4CH CD
T5+ T6T7+ T8CH ABC
T1+ T2T3+ T4T5+ T6CH ABCD
T1+ T2T3+ T4T5+ T6T7+ T8-
Amplifier Control
NOTE: The following scenarios assume that the amplifier
is connected to the Q-Sys Core via Q-LAN. When the
amplifier is not connected to the Q-Sys Core, it is in a Fault
mode, and not operational.
NEXT & PREV Buttons
• Rear power switch is off, the amplifier is not operable. The power
switch is the AC Mains disconnect.
• The power button is not illuminated.
PREV
• Navigates forward and backwards through the screens.
ID Button
Off Mode
NEXT
ID
• Press this button to display a screen with the amplifier's network
name. In addition, the ID buttons on the associated Q-Sys Amplifier
component and the associated Q-Sys Configurator item flashes. Press
again, or click one of the other ID buttons, to stop the flashing and
exit the screen.
• Turn the power switch to on. The amplifier enters the mode in which
it was when power was removed – Run, Mute All, or Standby.
• When prompted, press this button to change the amplifier
configuration to match the configuration of the associated
Q-Sys design.
Run Mode
SEL Buttons
• From Standby or Mute All mode, press and release the power button
on the front panel. The amplifier is in Run Mode.
• Use these buttons to select an output channel in order to change
the Gain.
• The power button is illuminated green.
• Select more than one channel to change multiple gain settings at the
same time.
• The amplifier is fully operable; audio can pass.
SEL
• If two or more outputs are bridged or in parallel, pressing one button
in the group selects all channels in that bridged or parallel group.
Standby Mode
• From Mute All or Run mode, press and hold the power button on the
front panel for approximately four seconds.
• The power button illuminates solid red.
• The amplifier is not operable; audio will not pass.
Mute Buttons
MUTE
• Use these buttons to mute the audio of the associated output
channel.
• When the output configuration is changed, the Mute buttons are
engaged automatically. You must manually unmute the channels.
Mute All Mode
• From the Run Mode, quickly press and release the power button.
• The power button flashes red, all output Mute buttons are red.
• The amplifier output is disabled, but the front panel is fully operable.
Master Control Knob
• When a new design is sent to the amplifier from Q-Sys, the outputs
are muted while the amplifier is offline.
Pinhole Reset
• Insert a paper clip or similar tool into the pinhole then press and hold
for 5 seconds to reset the amplifier to the factory default settings. The
default settings include network settings, and amplifier name.
• Adjusts the Gain for the selected channel or channels. At least one
channel must be selected.
• When one or more channels are selected, turn the Master Control
knob to jump to the Gain screen. After a few seconds with no activity,
it returns to the earlier screen.
• If there is more than one channel selected, and the gains for those
channels are different, the difference is maintained unless the gain is
raised or lowered to the limits for both channels.
8 (DRAFT 2014/08/09)
Inputs and Outputs
The CXD-Q amplifiers have four Mic/Line Inputs and four amplified Outputs on the rear of the amplifier. The Inputs and Outputs on the rear of the
amplifier are not connected inside the amplifier.
The analog inputs are converted to digital audio in the CXD-Q amplifiers and then routed to the Q-Sys Core via Q-LAN (LAN A, LAN B). The digital
signals are brought into the design in the CXD-Q Amplifier Input component. From the CXD-Q Input component the signals can be sent anywhere
within the system.
Likewise, in Q-Sys Designer digital signals are received at the CXD-Q Output component and fed from the Q-Sys Core to the analog amplified outputs
of the CXD-Q via Q-LAN. The CXD-Q output component can have one to four outputs depending on the configuration of the amplifier. The desired
configuration is selected in the properties menu for that amplifier. Use the ID button on the front panel of the amplifier to accept the configuration.
+
+
CH B
+
CH C
+
CH D
-
T1
CH A
ROUTABLE INPUTS
1
2
3
4
Q-LAN
CXD4.3Q In
cxq-1234
Q-Sys
DSP, Routing,
and so on.
CXD4.3Q Out
cxq-1234
Q-LAN
CXD-Q Output
Component
CXD-Q Input
Component
T2
T3
T4
T5
T6
T7
T8
— Figure 14 —
Screens
CHANNEL CONFIGURATION
Channel Configuration Screens
1. Graphic representations of the amplifier's output configuration. Inputs (Q) are from Q-Sys, 1
outputs (A-D) show the amplifier channels and their configuration.
2. Text indicating how many channels, and the output configuration. For possible
configurations refer to the Q-Sys help for the CXD-Q Amplifier component.
Q A
2
3
Q B
Q C
Q D
4 Channels: A B C D
Channel Configuration Locked to Design
3. Status of the amplifier and Q-Sys design indicating the design and amp are in sync.
4. Status of the amplifier indicating that action is necessary to synchronize the design
and amplifier.
CHANNEL CONFIGURATION
4
5. Action you need to perform to change the amplifier configuration. Press the ID button to
the right of the message.
Design requires 3 Channels: A+B C D
Q A
Q B
Q C
Q D
4 Channels: A B C D
Status Screen
5
Press ID to Accept
1. DEVICE: This is the hostname (network name) of the amplifier. A default name is given at
the factory, similar to the example. You may change the name in the Q-Sys Configurator.
— Figure 15 —
2. DESIGN: This is the name of the Q-Sys design containing the amplifier. The amplifier must
be in a running design to operate.
3. STATUS: Displays the current status of the amplifier both in text and color. The following is 1
2
a list of possible status colors, and some example conditions.
• OK – Green – Audio is good, hardware is good.
• Compromised – Orange – Audio is good but a redundancy mechanism is active (one
LAN down but the other is still up) or a non-fatal hardware problem exists (fans too
slow, temperature higher than expected, etc.)
• Fault – Red – Audio is not passing, or hardware is malfunctioning or mis-configured
(amplifier power off, audio streams broken, amplifier fault, loudspeaker short
circuit, etc.)
• Initializing – Blue – In the process of initialization, and design start. Audio is not passed.
9 (DRAFT 2014/08/09)
DEVICE:
STATUS
CXQ-1234
DESIGN:
My Design Filename
3
STATUS:
4
FIRMWARE:
5
OK
4.0.00
GAIN AB: -27.0 dB
6
— Figure 16 —
GAIN C:
0 dB
GAIN D:
10.0 dB
4. FIRMWARE: The Q-Sys Designer firmware version. To update the firmware:
a. The version you want to use must be installed on your PC,
b. The amplifier must be connected to the network, and turned on.
c. Open the Q-Sys design containing the amplifier and select "Save to Core and Run" from the File menu.
d. The amplifier Q-LAN processor and any other Q-Sys peripherals in the design are automatically updated.
5. GAIN A - D: Displays the current Gain setting for each channel. If channels are combined, they are displayed together. The green background gives
a graphical indication of the Gain.
LAN A
LAN A / LAN B Screen
1. Default IP Address. You can change this and the other parameters in Q-Sys Configurator.
LAN A is required, and cannot be turned off.
2. Default Netmask.
1
2
3
IP ADDRESS:
192.168.xxx.xxx
NETMASK:
255.255.0.0
GATEWAY:
0.0.0.0
4
LAN B
IP ADDRESS:
3. Default Gateway.
NETMASK:
4. LAN B is not required, as indicated by empty fields in Figure 17.
GATEWAY:
— Figure 17 —
Health Screen
1. FAN RPM – varies depending on the temperature.
2. PSU TEMP – Temperature of the Power Supply Unit.
• 55º C causes a compromised state for the amplifier.
• 63º C Mutes Audio
3. Channels A&C, and B&D.
• Thermal Limiting starts at 69º C, shows a compromised state
• Thermal Shutdown at 80º C
HEALTH
1
FAN RPM:
1109
2
PSU TEMP:
35.3°C
A&C Temp:
35.4°C
B&D Temp:
35.3°C
3
4
VRAIL 1:
149
VRAIL 2:
-151
4. Voltage Rails
— Figure 18 —
• CXD4.3Q & CXD4.5Q
» VRail 1 = +147 VDC +/- 5 V typical
» VRail 2 = -147 VDC +/- 5 V typical
• CXD4.2Q
» VRail 1 = +85 VDC +/- 5 V typical
» VRail 2 = -85 VDC +/- 5 V typical
Output Screens
OUTPUT A
Each output or group of outputs has a dedicated screen. Figure 19 is an example of Output A.
1. GAIN – The amount of gain applied to the input signal. Controlled by the GAIN knob on
the front panel of the amplifier, or the GAIN control in the CXD-Q Output component in
the Q-Sys Design.
2. INPUT – The level of the audio signal applied to the CXD-Q Output component in the
Q-Sys design. The CXD-Q Output component is the connection to the output section of
the amplifier. This meter reading can be changed from RMS to Peak in the Amplifier Out
component in the Q-Sys design.
1
GAIN:
-23.0 dB
2
Q-LAN INPUT:
-45.0 dB
3
VOLTAGE:
.777 V
4
POWER:
.011 W
5
HEADROOM:
3. VOLTAGE - The voltage being delivered to the loudspeaker. This reading can be RMS or
Peak depending on the Meter Select setting in the Q-Sys design for the associated channel.
-41.3 dB
DAC LIMIT
PROTECT
CLIP
LIMIT
6
7
8
9
— Figure 19 —
4. POWER – The power of the amplifier / loudspeaker circuit. This reading can be RMS or
Peak depending on the Meter Select setting in the Q-Sys design for the associated channel.
5. HEADROOM – The amount of room left before reaching the amplifier's maximum capabilities.
6. DAC LIMIT – When illuminated, this indicates that the signal to the D to A Converter is larger than can be reproduced and a limiter has been
engaged to prevent clipping. This is an indication that the gain structure is not correct.
7. PROTECT – When illuminated, this indicates that the channel is in Protect Mode. Usually due to driving too low of an impedance for too long.
8. LIMIT – When illuminated, this indicates the amplifier limiter is active. This occurs if the signal is driving the power, current, or voltage above the
amplifier rated values or due to thermal limiting.
10 (DRAFT 2014/08/09)
1
Output Gains Screen
2
The Output Gains screen provides a quick overview of all outputs and is the screen on which
GAIN adjustments are made.
Use the NEXT or PREV buttons to access this screen or, press one or more of the SEL buttons
to access the screen and make GAIN adjustments for the selected channels. If you press one
or more of the SEL buttons, and do not make any GAIN adjustments, this screen remains
visible for a short time the returns to the previous screen.
3
OUTPUT GAINS
AB
-45.0 dB
-8.08 dB
VOLTS:
101 V
4
5
6
C
-45.0 dB
1. The highlighted background indicates that the Channel is selected by the SEL button.
D
2. Channel – the channels display according to the configuration of the amplifier.
Q-LAN:
-45.0 dB
3. Output Gain – the output gain is controlled by the GAIN knob on the amplifier or with the
Gain control in the CXD-Q Output component in the Q-Sys design.
Q-LAN:
-100.0 dB
VOLTS:
.014 V
Q-LAN:
-100 dB
VOLTS:
.014 V
— Figure 20 —
4. Q-LAN Input Level – the level of the audio signal applied to the CXD-Q Output component in the Q-Sys design. The CXD-Q Output component is
the connection to the output section of the amplifier.
5. Voltage – The voltage applied to that output.
6. Output B is combined with Output A, the slot for Output B is removed.
GPIO
Connector
Pin
Examples
GPIO # and
Function
Specifications
1
3.3 V
100 mA max (power cycle to reset current limiting)
2
GPIO 1
5mA in/out, 3.3V max, 127 Ohm resistor in series
3
GPIO 2
5mA in/out, 3.3V max, 127 Ohm resistor in series
4
GND
Ground
5
GPIO 3
5mA in/out, 3.3V max, 127 Ohm resistor in series
6
GPIO 4
5mA in/out, 3.3V max, 127 Ohm resistor in series
7
GND
Ground
8
GPIO 5
18mA in/out max, 3.3V max, 127 Ohm resistor in series
9
RELAY NO
Relay Normally Open
10
RELAY COM
Relay Common
11
RELAY NC
Relay Normally Closed
12
GND
Ground
13
GPIO 6
18mA in/out max, 3.3V max, 127 Ohm resistor in series
14
GPIO 7
18mA in/out max, 3.3V max, 127 Ohm resistor in series
15
GND
Ground
16
GPIO 8
18mA in/out max, 3.3V max, 127 Ohm resistor in series
Button or Contact Closure
GPIO
Ground
Q-Sys-Powered LED
GPIO 5-8
+3.3 V
Ground
— Figure 22 —
11 (DRAFT 2014/08/09)
9
10
11
12
13
14
15
16
— Figure 21 —
Potentiometer
GPIO
Analog In
1
2
3
4
5
6
7
8
10 kΩ
Ground
Works for LEDs up to 18 mA.
Current is limited in the GPIO circuit
by a 127 resister in series.
Specifications
CXD-Q 4.2
CXD-Q 4.3
CXD-Q 4.5
4 Channel
100 Vrms
70 Vrms
8
4
2
Burst
N/A
N/A
500 Watts
700 Watts
600 Watts
Continuous
N/A
N/A
400 Watts
400 Watts
325 Watts
Burst
N/A
N/A
900 Watts
1400 Watts
1200 Watts
Continuous
500
625
625 Watts
625 Watts
625 Watts
Burst
N/A
N/A
1200 Watts
2000 Watts
1600 Watts
Continuous
1000
1250
1150 Watts
1250 Watts
625 Watts
2 Channel
8
4
2
Burst
1200 Watts
1500 Watts
1500 Watts
Continuous
800 Watts
800 Watts
650 Watts
Burst
2400 Watts
2000 Watts
2500 Watts
Continuous
1250 Watts
1250 Watts
1250 Watts
Burst
4000 Watts
2400 Watts
4000 Watts
Continuous
2250 Watts
2250 Watts
2100 Watts
1 Channel
8
4
2
1
Burst
1600 Watts
2500 Watts
1700 Watts
2500 Watts
Continuous
1500 Watts
1600 Watts
1600 Watts
1600 Watts
Burst
3500 Watts
5000 Watts
3500 Watts
5000 Watts
Continuous
2500 Watts
2500 Watts
2500 Watts
2500 Watts
Burst
4500 Watts
7500 Watts
4500 Watts
7500 Watts
Continuous
4200 Watts
4200 Watts
4250 Watts
3700 Watts
Typical Distortion
8
4
0.01 - 0.03%
0.03 - 0.06%
0.01 - 0.03%
0.03 - 0.06%
0.01 - 0.03%
0.03 - 0.06%
Maximum Distortion 4 - 8
1.0%
1.0%
1.0%
Frequency response (8)
20 Hz - 15 kHz +/- 0.2 dB
20 Hz - 20 kHz +0.2 dB / -0.7 dB
20 Hz - 15 kHz +/- 0.2 dB
20 Hz - 20 kHz +0.2 dB / -0.7 dB
20 Hz - 15 kHz +/- 0.2 dB
20 Hz - 20 kHz +0.2 dB / -0.7 dB
-101 dB
-109 dB
-101 dB
-109 dB
-101 dB
-109 dB
Gain (1.2 V setting)
34.0 dB
38.4 dB
38.4 dB
Damping factor
>150
>150
>150
Input impedance
>10 k, balanced or unbalanced
>10 k, balanced or unbalanced
>10 k, balanced or unbalanced
Maximum input level
(3.9 V setting)
(1.2 V setting)
12.28 V (+24 dBu)
3.88 V (+14 dBu)
12.28 V (+24 dBu)
3.88 V (+14 dBu)
12.28 V (+24 dBu)
3.88 V (+14 dBu)
Noise
Unweighted Output Unmuted
Weighted Output Muted
Controls and indicators (front)
Power • Channel MUTE Buttons • Channel SELECT Buttons • Channel Input Signal and CLIP LED Indicators •
Channel Output and LIMIT LED Meters • NEXT, PREV, ID Buttons • Control Knob • FAULT LED • Pinhole Reset
Controls and indicators (rear)
AC Power Disconnect
Input connectors
Line Input
GPI Input
3-pin Euro-style
2-pin Euro-style 3.5 mm
Output connectors
Loudspeaker Output
GPIO Output
8-pin Euro-style
3-pin Euro-style 3.5 mm
Amplifier and load protection
Short circuit, open circuit, thermal, RF protection. On/Off muting, DC fault shutdown, active inrush limiting
AC Power Input
Universal Power Supply 100 - 240 VAC, 50 - 60 Hz
Dimensions (HWD)
3.5” x 19” x 12” (89 x 482 x 305 mm)
3.5” x 19” x 16” (89 x 482 x 406 mm)
3.5” x 19” x 16” (89 x 482 mm x 406 mm)
Weight, Net / Shipping
18.5 lb (8.4 kg) / 22 lb (10.0 kg)
21.0 lb (9.5 kg) / 25 lb (11.3 kg)
22.0 lb (10.0 kg) / 26 lb (11.8 kg)
Burst Power – 20 ms 1 kHz sine burst, all channels driven
Continuous Power – EIA 1 kHz 1% THD, all channels driven
12 (DRAFT 2014/08/09)
Heat Loss Charts
Heat losses are the thermal emissions from an amplifier while it is operating. It comes from dissipated waste power—i.e., real AC power in minus audio
power out. Measurements are provided for various loads at idle, 1/8 of average full power, 1/3 of average full power, and full power, with all channels
driven simultaneously. For typical usage, use the idle and 1/8 power figures. This data is measured from representative samples; due to production
tolerances, actual heat emissions may vary slightly from one unit to another. Bridged mono into 8 ohms is equivalent to 4 ohms per channel; into 4
ohms is equivalent to 2 ohms per channel.
BTU/hr
kcal/hr
180
46
Idle
CXD-Q 4.2
CXD-Q 4.3
225
57
CXD-Q 4.5
286
72
Load per Channel
8Ω
4Ω
BTU/hr
2Ω
BTU/hr
kcal/hr
kcal/hr
CXD-Q 4.2
432
109
476
120
CXD-Q 4.3
684
172
794
200
CXD-Q 4.5
811
204
1144
288
BTU/hr
25V-70V-100V
kcal/hr
BTU/hr
kcal/hr
597
150
nr
nr
1040
262
nr
nr
1124
283
nr
nr
1/8th Power
1/3rd Power
CXD-Q 4.2
849
214
873
220
1215
306
nr
nr
CXD-Q 4.3
983
248
1261
318
1869
471
nr
nr
CXD-Q 4.5
881
222
1708
430
1737
438
nr
nr
Full Power
CXD-Q 4.2
1352
341
1478
372
2120
534
nr
nr
CXD-Q 4.3
2498
629
2925
737
4198
1058
nr
nr
CXD-Q 4.5
3116
785
5318
1340
4208
1060
nr
nr
Idle
Thermal loss at idle or with very low signal level.
1/8 Power
Thermal loss at 1/8 of full power is measured with pink noise. It approximates operating with music or voice with light clipping and represents the
amplifier's typical "clean" maximum level, without audible clipping. Use these figures for typical maximum level operation.
1/3 Power
Thermal loss at 1/3 of full power is measured with pink noise. It approximates operating with music or voice with very heavy clipping and a very
compressed dynamic range.
Full Power
Thermal loss at full power is measured with a 1 kHz sine wave. However, it does not represent any real-world operating condition.
13 (DRAFT 2014/08/09)
Mailing Address:
QSC Audio Products, LLC
1675 MacArthur Boulevard
Costa Mesa, CA 92626-1468 USA
Telephone Numbers:
Main Number: (714) 754-6175
Sales & Marketing: (714) 957-7100 or toll free (USA only) (800) 854-4079
Customer Service: (714) 957-7150 or toll free (USA only) (800) 772-2834
Facsimile Numbers:
Sales & Marketing FAX: (714) 754-6174
Customer Service FAX: (714) 754-6173
World Wide Web:
www.qsc.com
E-mail:
info@qsc.com
service@qsc.com
tech_support@qsc.com
© 2014 QSC Audio Products, LLC. All rights reserved. QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark office and
other countries. All other trademarks are the property of their respective owners.
http://patents.qsc.com.
14 (DRAFT 2014/08/09)