Multi-Channel System
Processing Amplifiers
CXD Series
CXD4.2 | CXD4.3 | CXD4.5
CXD4.2 | CXD4.3 | CXD4.5
Features
• Total power up to 8,000 watts with
70V and 100V direct drive on the
CXD4.3 and CXD4.5.
• Flexible Amplifier Summing
Technology™ (FAST) drives
most any loudspeaker system or
configuration by distributing total
amplifier power across one, two,
three or all four channels.
• Full function onboard loudspeaker
processing DSP with Crossover
and Parametric EQ Filters, Limiting
and Alignment Delay eliminate the
need for outboard loudspeaker
processors.
• PowerLight universal switchmode
power supply with PFC for
highest effiency, improved audio
performance, and low heat
dissipation.
• Preset Wizard simplifies amplifier
setup providing system design tools
and loudspeaker selection from a
list of speakers.
• Powerful Intrinsic Correction™
processing maximizes the sonic
performance of QSC loudspeakers.
• 20 Factory Preset configurations
that can be modified and stored in
the 50 User Presets.
• Integrated front panel with channel
Select and Mute buttons, Input and
Output LED Metering, 400x240
LCD, intuitive navigation buttons,
LED power button and indicator,
and cast aluminum handles.
• GPIO for additional functionality
including a heartbeat output for
Life-Safety supervision.
• Four Input Euroblock connectors,
and four Euroblock touch-proof
Speaker connectors.
The QSC CXD Series represents a revolutionary
advancement in amplifier technology and
innovation. Designed specifically for the needs
of integrators, CXD provides efficient, robust
and extraordinarily high fidelity power to drive
multiple channels and configurations of
loudspeakers while simultaneously deploying
sophisticated digital processing – all with
optimal energy and rack space efficiency. The
CXD Series consists of three powerful, fourchannel amplifiers, each with onboard DSP, and
the capability 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 to 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 Technology™
(FAST)
CXD amplifiers feature Flexible Amplifier
Summing Technology™ (FAST) that actively
distributes the total amplifier power in various
configurations across one, two, three or all four
outputs. On the CXD4.3 and CXD4.5, this
power can also be used to drive 70V or 100V
speaker lines directly from any one or all of the
four outputs. This flexibility allows CXD 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 highpower channel driving monster subwoofers.
Power Efficiency
CXD Series amplifiers use QSC’s next
generation class-D power amp design in
combination with a custom power stage
utilizing a new output device. These purpose
built MOSFET devices provide high voltage
operation without needing a full bridge output
and offer better audio quality and thermal
performance due to co-location of the
semiconductors.
CXD amplifiers benefit from the proven
PowerLight power supply, made even better
with Power Factor Correction (PFC) that aligns
the current waveform with the AC mains
voltage waveform. PFC enables CXD Series
amps to draw current from the wall in a more
efficient and controlled manner resulting in
incredible power from a single standard AC
breaker.
CXD amplifiers also incorporate several energy
conservation and efficiency strategies. One
such tool is the unique multi-stage sleep mode
that saves energy when possible without
sacrificing performance.
System Processing
A single CXD Series amplifier is more than just
an amplifier. It is also a capable and
sophisticated loudspeaker processor.
Integration of DSP and amplification means that
the processor knows exactly what the amplifier
is doing, allowing the dynamics processing and
protection circuitry to be far more accurate and
effective. This synergistic approach employs
both RMS and Peak Limiters that provide the
amplifier and loudspeaker combination to
produce more output without being pushed to
distortion or destruction.
The onboard DSP offers four channels of
crossover filters, parametric EQ, alignment
delay and dynamics processing - everything
needed to optimize a loudspeaker system.
Additionally when using QSC loudspeakers, the
CXD amplifiers offer Intrisic Correction™, a
combination of Filtering, Limiting and speaker
processing first developed for our WideLine line
array loudspeakers, that compensates for the
non-linearities in array and horn design,
resulting in exceptional performance.
Space Efficient
With four channels of amplification plus signal
processing in just 2RU, the CXD series replaces
equipment taking up as much as three times
the rack-space.
Simplicity and Control
The on-board processing is managed and
stored as presets, with 20 modifiable factory
presets for the most common applications. A
Preset Wizard is also available that simplifies
amplifier setup and enables selection of
loudspeakers. With an intuitive front panel UI,
programming is a breeze. The CXD amplifiers
also offer GPIO for system supervision and the
ability to utilize contact closures to set the
amps into standby or recall specific presets.
With a host of integration features the CXD
amplifiers are perfect for your application.
CXD Details
4 Independent Channels
A, B, C, D
2 Channels BTL Bridged
A+B or C+D
Doubles Voltage
2 Channels Parallel
AB or CD
Doubles Current
1 Channel 3CH Parallel
ABC
Triples Current
1 Channel Bridged/Parallel
AB+CD
Doubles Current and Voltage
1 Channel 4CH Parallel
ABCD
Quadruples Current
CXD4.2 CXD4.3 CXD4.5
Peak Peak Peak
70 V N/A 500 W 1000 W
100 V N/A 625 W 1250 W
8Ω 500 W 900 W 1200 W
4Ω 700 W 1400 W 2000 W
2Ω 625 W 1200 W 1600 W
8Ω 1200 W 2400 W 4000 W
4Ω 1500 W NR* NR*
2Ω NR* NR* NR*
8Ω 500 W 1300 W 1250 W
4Ω 950 W 2000 W 2400 W
2Ω 1200 W 2500 W 4000 W
8Ω 500 W 1400 W 1400 W
4Ω 950 W 2400 W 2500 W
2Ω 1800 W 3500 W 4500 W
8Ω 1600 W 3500 W 4500 W
4Ω 2500 W 5000 W 7500 W
2Ω NR* NR* NR*
8Ω 500 W 1400 W 1600 W
4Ω 1000 W 3000 W 3000 W
2Ω 1700 W 5000 W 5300 W
NR* = Not Recommended due to excessive current draw
BOLD = Optimal configuration for the load and channel count
CXD Details
Specifications subject to change without notice.
CXD4.2 CXD4.3 CXD4.5
Typical Distortion
8Ω
4Ω
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
4Ω - 8Ω 1.0% 1.0% 1.0%
Frequency response (8Ω)
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
Noise
Unweighted Output Unmuted
Weighted Output Muted
-101 dB
-109 dB
-101 dB
-109 dB
-101 dB
-109 dB
Gain (1.2V setting) 34.0 dB 38.4 dB 38.4 dB
Damping factor >150 >150 >150
Input impedance >10k, balanced or unbalanced >10k, balanced or unbalanced >10k, balanced or unbalanced
Maximum input level
(3.9V setting)
(1.2V setting)
12.28V (+24 dBu)
3.88V (+14 dBu)
12.28V (+24 dBu)
3.88V (+14 dBu)
12.28V (+24 dBu)
3.88V (+14 dBu)
Controls and indicators (front) Power • Channel MUTE Buttons • Channel SELECT Buttons • Channel Input Signal and CLIP LED Indicators •
Channel Output and LIMIT LED Meters • HOME, ENTER, EXIT, GAIN Navigation Buttons • Control Knob
Controls and indicators (rear) AC Power Disconnect AC Power Disconnect AC Power Disconnect
Input connectors 3-pin Euroblock 3-pin Euroblock 3-pin Euroblock
Output connectors 2-pin Euroblock Speaker 2-pin Euroblock Speaker 2-pin Euroblock Speaker
Amplifier and load protection Short circuit, open circuit, thermal, RF protection. On/Off muting, DC fault shutdown, active inrush limiting, input
current limiting
AC Power Input Universal Power Supply 100 - 240 VAC, 50 - 60 Hz
Dimensions (HWD) 3.5” x 19” x 12”
(89mm x 482mm x 305mm)
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 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)
Agency approvals UL, CE, RoHS/WEEE compliant, FCC Class A (conducted and radiated emissions)
Carton contents Locking IEC Cable, Quick Start Guide, USB Cable
Burst Power - 20 ms 1 kHz sine burst, all channels driven
Continuous Power - EIA 1 kHz 1% THD, all channels driven
please recycle
CXD Spec Sheet 09/09/16
CXD4.2 CXD4.3 CXD4.5
Peak Peak Peak
70 V N/A 500W 1000W
100 V N/A 625 W 1250 W
8Ω 500 W 900 W 1200 W
4Ω 700 W 1400 W 2000 W
2Ω 625 W 1200 W 1600 W
8Ω 1200 W 2400 W 4000 W
4Ω 1500 W NR* NR*
2Ω NR* NR* NR*
8Ω 500 W 1300 W 1250 W
4Ω 950 W 2000 W 2400 W
2Ω 1200 W 2500 W 4000 W
8Ω 500 W 1400 W 1400 W
4Ω 950 W 2400 W 2500 W
2Ω 1800 W 3500 W 4500 W
8Ω 1600 W 3500 W 4500 W
4Ω 2500 W 5000 W 7500 W
2Ω NR* NR* NR*
8Ω 500 W 1400 W 1600 W
4Ω 1000 W 3000 W 3000 W
2Ω 1700 W 5000 W 5300 W
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
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countries. All other trademarks are the property of their respective owners. Patents may apply or be pending.