QSC PLD4.3 Processing Amplifier with FAST™ Technology

Powerful Intrinsic Correction™, four channels of full function onboard loudspeaker DSP, 20 factory preset configurations

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What's in the box:

  • QSC PLD4.3 Processing Amplifier
  • Locking IEC Cable
  • USB Cable
  • Limited Three-Year Warranty


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The QSC PLD4.3, part of the PLD Series, represents a revolutionary advancement in amplifier technology and innovation. Designed specifically for the needs of portable and production sound system users, the QSC PLD4.3 processing amplifier provides efficient, robust and extraordinarily high-fidelity power to drive multiple channels and configurations of loudspeakers while simultaneously deploying sophisticated digital processing - all with minimal operator complexity. The PLD Series consists of three powerful, lightweight, four-channel audio amplifiers, each with onboard, advanced DSP and the capability to configure and combine channels in various ways to drive a wide range of loudspeaker systems.


  • Flexible Audio Amplifier Summing Technology™ (FAST) drives most any loudspeaker system or configuration by distributing total amplifier power across one, two, three or all four channels
  • Four channels of full function onboard loudspeaker DSP with Crossover and Parametric EQ Filters, Limiting and Alignment Delay eliminate the need for outboard loudspeaker processors
  • 20 Factory Preset configurations that can be modified and stored in the 50 User Presets
  • PowerLight universal switchmode power supply with PFC for highest efficiency, improved audio performance, and low weight
  • Four Input XLR connectors, and six NL-4 Output connectors
  • 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
  • Preset Wizard simplifies amplifier configuration providing loudspeaker selection from a list of the top selling passive speakers
  • Powerful Intrinsic Correction™ processing maximizes the sonic performance of QSC loudspeakers

Be sure to check out the brochure and video for more information!

Specifications for the QSC PLD4.3 Processing Amplifier

{ "Number of Channels" : "4", "Power Class" : "Class-D", "Watts/Side @ 8 ohms" : "900W Peak, 625W Continuous", "Watts/Side @ 4 ohms" : "1400W Peak, 625W Continuous", "Watts/Side @ 2 ohms" : "1200W Peak, 625W Continuous", "Inputs" : "4 x XLR", "Outputs" : "6 x NL-4", "Rack Spaces" : "2U", "Height" : "3.5"", "Depth" : "16"", "Width" : "19"", "Weight" : "21 lbs.", "Manufacturer Part Number" : "PLD4.3-NA" }

Research Materials for QSC PLD4.3 Processing Amplifier

We've added technical materials to help with your buying decision. Even if you're technically inclined, you may want to consider talking to our sales techs to make sure this item is the right fit for your particular use. 800.562.6006

PLD4.3 Processing Amplifier User Guide

PLD Processing Amplifier Quick Start Guide

PLD4.3 Processing Amplifier Drawing

PLD Processing Amplifier Application Guide

PLD4.3 Processing Amplifier Specifications

Advanced Amplifier Technologies Seminar - PLD/CXD/CXD-Q

QSC: PLD/CXD Product Pillars

PLD/CXD: Product Introduction (English)

PLD/CXD: Preset Wizard, Speaker Wizard & Utility (User Interface Training)

PLD/CXD Amplifier Navigator Software

PLD/CXD: Inputs/Outputs & EQ Processing (User Interface Training)

QSC: PLD/CXD: "An Inside Look"

Understanding Sound Reinforcement - Power Amplifiers (Part 2)

Understanding Sound Reinforcement - Power Amplifiers (Part 1)

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