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4-Channel 625W @ 2/4/8 Ohm Processing Power Amplifier


QSC PLD and CXD Amplifiers – Quick Overview

The QSC CXD4.3 is a 4-Channel 625W @ 2/4/8 Ohm Power Amplifier for install applications. It's a part of QSC's CXD Series of power amps.

CXD Series
Representing a revolutionary advancement in amplifier technology and innovation, the QSC CXD Series is specifically geared toward the needs of integrators, providing efficient, robust, and extraordinarily high fidelity power to drive multiple channels and configurations of loudspeakers while simultaneously deploying sophisticated digital processing – all with the optimal efficiency in energy and rack space. The series consists of 3 powerful, 4-channel amplifiers, each with onboard DSP, as well as the capability to configure and combine channels in various methods to drive a wide range of loudspeaker systems – including 70V and 100V – all without transformers. These amps not only deliver the power and processing to improve your systems performance, they also offer outstanding efficiency, ensuring that energy costs will minimized over the lifespan of the installation.

Flexible Amplifier Summing Technology™ (FAST)
Another feature is Flexible Amplifier Summing Technology™ (FAST), actively distributing the total amplifier power in various configurations across 1, 2, 3, or all 4 outputs. On the CXD4.3 and CXD4.5 models, this power can also be used to directly drive 70V or 100V speaker lines from any one or all of the 4 outputs. This flexibility lets this series of amplifiers drive -for example- 2 full-range surface-mounted speakers along with a subwoofer and (1) 100V distributed speaker line; a high-power subwoofer and a bi-amplified full-range loudspeaker; (3) 70V distributed speaker lines and a low impedance surface mount speaker line; or even a single high-power channel driving monster subwoofers.

Power Efficiency
These amplifiers employ QSC’s next-generation class-D power amp design in concert with a custom power stage, utilizing a new output device. These purpose-built MOSFET devices offer high-voltage operation with no need for a full bridge output, and provide enhanced audio quality and thermal performance thanks to co-location of the semiconductors.

This series benefits from the proven PowerLight power supply, made even better with Power Factor Correction (PFC) technology which aligns the current waveform with the AC mains voltage waveform. PFC enables these amplifiers to draw current from the wall in a more controlled and efficient manner, resulting in incredible power from a single standard AC circuit.

Also incorporated in the CXD Series are several energy efficiency and conservation strategies. One such tool is the unique multi-stage sleep mode which saves energy whenever possible without sacrificing performance.

System Processing 
Mmore than just an amplifier, a single CXD Series amplifier is also a capable and sophisticated loudspeaker processor. DSP and amplification integration means that the processor is aware of exactly what the amplifier is doing, allowing the dynamics processing and protection circuitry to be far more precise and therefore effective. It's a synergistic approach that employs both RMS and Peak Limiters, enabling the amplifier and loudspeaker combination to produce more output without being pushed to distortion or even destruction.

The onboard DSP provides 4 channels of crossover filters, parametric EQ, alignment delay, and dynamics processing - everything necessary for the optimization of a loudspeaker system. In addition, when using QSC loudspeakers, the CXD amplifiers offer Intrisic Correction™ – a combination of Filtering, Limiting, and speaker processing first developed for QSC's WideLine line array loudspeakers, compensating for the non-linearities in array and horn design, and resulting in superb performance.

Space Efficient
With 4 channels of amplification along with signal processing in just 2RU, the CXD series can replace equipment that can take up as much as 3 times the amount of rack-space.

Simplicity and Control
The series' on-board processing is managed and stored as presets, with 20 modifiable factory presets addressing the most common applications. A Preset Wizard is also available, simplifying amplifier setup and enabling loudspeaker selection. With the series' intuitive front-panel UI, programming is a breeze. The CXD amplifiers also provide GPIO for system supervision as well as the ability to utilize contact closures to set the amps into standby or recall specific presets. With a range of integration features, the CXD amplifiers are ideal for your power amplification needs.

QSC CXD4.3 Features:

  • Flexible Amplifier Summing Technology™ (FAST) drives most any loudspeaker system or configuration by distributing total amplifier power across 1, 2, 3, or all 4 channels.
  • Includes 70V and 100V direct drive.
  • 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.
  • (4) Input Phoenix connectors, and (4) Phoenix touch-proof Speaker.

QSC CXD4.3 Features:

  • For specifications and further information, please refer to the "QSC CXD Series Datasheet" located under the "DOCUMENTATION" tab above.

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