QSC CXD4.2 700-Watt Four-Channel Processing Amplifier with DSP

  • 700 watts per channel @4 Ohms
  • Flexible Amplifier Summing Technology™ (FAST) drives most any loudspeaker system
  • Full function onboard loudspeaker processing DSP
  • E Series Entertainment System DSP Tunings are now available for CXD processing amplifiers
  • PowerLight universal switch-mode power supply

$1,877.00 CAD

In stock

SKU: 684284061270 Category: Tags: ,


About QSC CXD4.2 700-Watt Four-Channel Processing Amplifier

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. QSC CXD4.2 700-watt four-channel processing amplifier with DSP also incorporates 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 QSC CXD4.2 700-watt four-channel processing amplifier with DSP 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.

Additional information

Weight 17.15 lbs
Dimensions 23.2 x 14.4 x 6.6 in


QSC CXD4.2 700-Watt Four-Channel Processing Amplifier with DSP Features:

  • 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.
  • Capable of providing up to 5,000 watts continuous and 8,000 watts peak with 70V or 100V direct drive on each output of the CXD4.3 and CXD4.5, and on bridged output pairs of the CXD4.2.
  • Full function onboard loudspeaker processing DSP with crossover and parametric EQ Filters, limiting and alignment delay eliminate the need for outboard loudspeaker processors.
  • E Series Entertainment System DSP Tunings are now available for CXD processing amplifiers
  • PowerLight universal switch-mode power supply with PFC for highest efficiency, improved audio performance, and low heat dissipation.
  • 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, 400×240 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 Phoenix input connectors, and four Phoenix touch-proof loudspeaker output connectors


QSC CXD4.2 700-Watt Four-Channel Processing Amplifier with DSP Specifications:

  CXD4.2 CXD4.3 CXD4.5
Peak Continuous Peak Continuous Peak Continuous
4 Independent Channels
A, B, C, D
70V N/A N/A 500 W 500 W 1000 W 1000 W
100V N/A N/A 625 W 625 W 1250 W 1250 W
500 W 400 W 900 W 625 W 1200 W 1150 W
 4Ω 700 W 400 W 1400 W 625 W 2000 W 1250 W
 2Ω 625 W  325 W 1200 W 625 W 1600 W 625 W
2 Channel BTL Bridged
A+B or C+D
Doubles Voltage
1200 W 800 W 2400 W 1250 W 4000 W 2250 W
1500 W 600 W NR* NR* NR* NR*
2 Channel Parallel
AB or CD
Doubles Current
500 W 400 W 1300 W 1150 W 1250 W 1150 W
950 W 800 W 2000 W 1250 W 2400 W 2250 W
1200 W 800 W 2500 W 1250 W 4000 W 2100 W
1 Channel 3CH Parallel
Triples Current
500 W 400 W 1400 W 1150 W 1400 W 1150 W
950 W 800 W 2400 W 2000 W 2500 W 2400 W
1800 W 1200 W 3500 W 2500 W 4500 W 4100 W
1 Channel Bridged/Parallel
Doubles Current and Voltage
1600 W 1500 W 3500 W 2500 W 4500 W 4200 W
2500 W 1600 W 5000 W 2500 W 7500 W 4200 W
1 Channel 4CH Parallel
Quadruples Current
500 W 400 W 1400 W 1150 W 1600 W 1150 W
1000 W 800 W 3000 W 2500 W 3000 W 2300 W
1700 W 1600 W 5000 W 2500 W 5300 W 4200 W

NR* = Not Recommended due to excessive current draw
BOLD = Optimal configuration forthe load and channel count

General Specifications

CXD4.2 CXD4.3 CXD4.5
Typical distortion 0.01–0.06%
Maximum distortion 1.00%
Frequency response 20 Hz–15 kHz ±0.2 dB
20 Hz–20 kHz +0.2/-0.7 dB
Unweighted Output Unmuted
Weighted Output Muted
-101 dB
-109 dB
(1.2V setting)
34.0 dB 38.4 dB 38.4 dB
Damping factor >150
Input impedance >10k ohm, balanced or unbalanced
Maximum rms input level
(3.9V setting)
(1.2V setting)
12.28 V (+24 dBu)
3.88 V (+14 dBu)
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 4.2: Universal Power Supply 100-132/200–240 VAC, 50–60 Hz
4.3/4.5: Universal Power Supply 100–240 VAC, 50–60 Hz
Agency approvals UL, CE, RoHS/WEEE compliant, FCC Class A (conducted and radiated emissions)
Carton contents Locking IEC cable, Quick Start Guide, USB cable

Controls, Indicators and Connections

CXD4.2 CXD4.3 CXD4.5
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

Weights and Dimensions

CXD4.2 CXD4.3 CXD4.5
Dimensions (HWD) inches 3.5 × 19 × 16 3.5 × 19 × 16 3.5 × 19 × 16
Dimensions (HWD) mm 89 × 482 × 406 89 × 482 × 406 89 × 482 × 406
Weight Net 18.5 lb / 8.39 kg 21 lb / 9.53 kg 22 lb / 9.98 kg
Weight Shipping 22 lb / 10.0 kg 25 lb / 11.3 kg 26 lb / 11.8 kg

All specifications are subject to change without notice.


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