The QSC eight-channel CXD-Q and CXD-Qn
Series amplifiers represent an advancement in
amplifier technology coupled with outstanding
integration capability as part of a Q-SYS
system. Designed specifically for the needs
of integrators, CXD-Q and CXD-Qn provide
efficient, robust and extraordinarily high
fidelity power to drive multiple channels and
configurations of loudspeakers – all with
optimal energy and rack space efficiency. The
eight channel CXD-Q and CXD-Qn Series
amplifiers consist of an 8,000W and 4,000W
amplifier each. All models providing full Q-SYS
capability with audio routing, processing
and control. The amplifiers allow the user to
configure and combine channels in various
ways to drive a wide range of loudspeaker
systems including 70V and 100V without the
use of transformers. These amplifiers not only
provide the power and processing make your
system perform better, they offer outstanding
efficiency ensuring that energy costs will
be kept to a minimum over the life of the
installation.
Flexible Amplifier Summing
CXD-Q Series amplifiers feature Flexible
Amplifier Summing TechnologyTM (FAST) that
enables the eight channels to be combined
in banks of two with up to four channels
combining in each bank for higher output
power. With their +/- 150V rails, each channel
on the CXD-Q Series amplifiers is capable of
driving Low-Z, 70V, or 100V loads directly.
This flexibility allows CXD-Q Series amplifiers
to drive (for example) two full-range surface
mounted speakers along with a subwoofer
and one 100V distributed speaker line; or a
high-power subwoofer and a bi-amplified
full-range loudspeaker; three 70V distributed
speaker lines and a low impedance surface
mount speaker line; or a single high-power
channel driving monster subwoofers.
Q-SYS Connectivity
The CXD-Q and CXD-Qn Series amplifiers
are part of the Q-SYS Platform. They are
true Q-SYS peripherals meaning that
they can connect on a Q-LAN Layer-3
network with the capability to source and
receive signals. The CXD-Q models offer
eight channels of mic/line input (with +12V
phantom power) directly on the back of
the amplifier that act as a Q-SYS on-ramps
in addition to amplification. The CXD-Qn
models are network input only to simplify
system design and reduce system cost
when additional input are not needed. Both
models provide eight bi-directional GPIO
ports within the Q-SYS Platform for further
interfacing with other equipment. It also
means that the Q-Sys Platform can manage
the fault protection and notification for these
amplifiers. If for any reason an amplifier goes
off-line or has a fault, the platform can alert
the operator and ensure that system retains
its integrity.
Power & Space Efficiency
The CXD-Q and CXD-Qn Series eight channel
amplifiers use QSC’s fifth generation class-D
power amplifier design providing high voltage
operation and offer outstanding audio quality
and thermal performance. They benefit from
the proven PowerLight power supply made
better with Power Factor Correction (PFC)
that aligns the current waveform with the AC
mains voltage waveform. PFC enables these
amplifiers to draw current from the wall in a
more efficient and controlled manner resulting
in incredible output power from a single
standard AC breaker.
This series also incorporates several energy
conservation and efficiency strategies, one
of which is a unique multi-stage sleep mode
that saves energy when possible without
sacrificing performance.
With eight channels of amplification
addressable from the network in just 2RU
and eight channels of mic/line inputs on the
“Q” models, the CXD-Q amplifiers replace
equipment taking up as much as three times
the rack space.
Integration Simplicity
The Q-SYS Platform is a complete integrated
system that encompasses everything from the
audio input to the output of the loudspeakers.
As part of a Q-SYS system, the CXD-Q and
CXD-Qn Series amplifiers are just some of
the many peripherals that can be intuitively
placed in a design and wired into the system.
The centralized design maintains operational
simplicity because not only does it allow for a
“whole system” design philosophy, but Q-SYS
configures and manages all peripherals to
ensure that all elements of the system are
functioning correctly.
Features
• Seamless Q-SYS integration
with audio transport and
control via standard Gigabit
Ethernet protocols and
hardware
• Capable of providing up to
8,000 W maximum power
and 5,000 W continuous
with Low-Z, 70V, or 100V
direct drive available on all
channels
• Flexible Amplifier Summing
TechnologyTM (FAST) permits
up to four channels to be
combined for higher output
power
• PowerLight universal
switchmode power supply
with PFC for highest
efficiency, improved audio
performance, and low weight
• CXD-Q models offer mic/
line inputs into the Q-SYS
ecosystem while CXD-Qn
models are “network input
only” to reduce system cost.
All models provide touchproof Euroblock loudspeaker
connections
• Eight bi-directional GPIO
connections that can be
used for analog or digital
inputs or outputs to/from
Q-SYS
• Built-in energy saving modes
ensure that the amplifier will
draw the minimum amount of
AC power while still providing
outstanding audio quality
8 Channel CXD-Q &
CXD-Qn Series
Multi-Channel Network Amplifiers
CXD8.8Q | CXD8.8Qn
CXD8.4Q | CXD8.4Qn
CXD8.8Q | CXD8.8Qn | CXD8.4Q | CXD8.4Qn
8-Channel CXD-Q Series Specifications
8 Independent Channels
A, B, C, D, E, F, G, H
2 Channels Combined in BTL Bridge
A+B or C+D or E+F or G+H
Doubles Voltage
2 Channels Combined in Parallel
AB or CD or EF or GH
Doubles Current
3CH Combined in Parallel
ABC or EFG
Triples Current
4CH Combined in Bridged/Parallel
AB+CD
Doubles Current and Voltage
4CH Combined in Parallel
ABCD or EFGH
Quadruples Current
CXD8.4Q / CXD8.4Qn CXD8.8Q / CXD8.8Qn
Max Power Max Power
70 V 500 W 850 W
100 V 500 W 850 W
8Ω 500 W 850 W
4Ω 500 W 1000 W
2Ω 500 W 600 W
8Ω 1000 W 2000 W
4Ω NR NR
2Ω NR NR
8Ω 1000 W 1100 W
4Ω 1000 W 1800 W
2Ω 1000 W 2000 W
8Ω 1000 W 1100 W
4Ω 1500 W 1800 W
2Ω 1500 W 2800 W
8Ω 2000 W 3600 W
4Ω 2000 W 4500 W
2Ω NR NR
8Ω 1200 W 1200 W
4Ω 2000 W 2200 W
2Ω 2000 W 4000 W
NR* = Not Recommended due to excessive current draw
Max Power - 20 ms 1 kHz Sine wave burst, all channels driven.
BOLD = Optimal configuration for the load and channel count
CXD8.4Q / CXD8.8Q
CXD8.4Qn / CXD8.8Qn
8-Channel CXD-Q Series Specifications
CXD8.4Q / CXD8.4Qn CXD8.8Q / CXD8.8Qn
Typical distortion
8Ω
4Ω
0.02 - 0.05%
0.04 - 0.1%
0.02 - 0.05%
0.04 - 0.1%
Maximum distortion
4Ω - 8Ω 1.0% 1.0%
Frequency response (8Ω) 20 Hz - 20 kHz +/- 0.3 dB 20 Hz - 20 kHz +/- 0.3 dB
Noise
Unweighted output unmuted
Weighted output muted
>101 dB
>104 dB
>101 dB
>104 dB
Gain (1.2V setting) 38.4 dB 38.4 dB
Damping factor >100 >100
Input impedance >8k balanced and >4k unbalanced >8k balanced and >4k unbalanced
Input Sensitivity
Continuously variable: Vrms 1.23mV to 17.35V
dBu -56 to 27
dBv -58.2 to 24.8
Vrms 1.23mV to 17.35V
dBu -56 to 27
dBv -58.2 to 24.8
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
Controls and indicators (rear) Euro (green) Power Disconnect
Input connectors
CXD8.4Q & CXD8.8Q
CXD8.4Qn & CXD8.8Qn
3-pin Euro (green) and Q-LAN Network connectivity
Q-LAN Network connectivity only
Output connectors 8-pin Euro (green)
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 16”
(89mm x 482mm x 406mm)
3.5” x 19” x 16”
(89mm x 482mm x 406mm)
Weight, net / shipping 25 lb (11.3 kg) / 29 lb (13.2 kg) 26 lb (11.8 kg) / 30 lb (13.6 kg)
Agency approvals UL, CE, RoHS/WEEE compliant, FCC Class B (conducted and radiated emissions)
Carton contents IEC Cable, quick start guide, Euro (green) connectors
8 Channel CXD-Q Spec Sheet 06/2018
please recycle
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
© 2018 QSC, LLC all rights reserved. QSC, Q-SYS and the QSC logo are registered trademarks of QSC, LLC in the U.S. Patent and Trademark office and other
countries. All other trademarks are the property of their respective owners. Patents may apply or be pending.