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QSC PLD4.3 Power Amplifier w/ DSP: 4-Channel, 1400 Watts

QSC PLD4.3 Power Amplifier w/ DSP: 4-Channel, 1400 Watts QSC PLD4.3 Power Amplifier w/ DSP: 4-Channel, 1400 Watts
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Your Price: $1,499.99
List Price: $1,899.99

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Availability: Usually Ships In 7 - 14 days

Sales SKU: QSCPLD-1400
Product Code: PLD4.3

The QSC PLD Series represents a revolutionary advancement in amplifier technology and innovation. Designed specifically for the needs of portable and production sound system users, PLD 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 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. These amplifiers not only make your system perform better today, but also provide a wide and flexible range of options for future system growth.

Flexible Amplifier Summing Technology™ (FAST)
FAST actively distributes the total amplifier power in various combinations across one, two, three, or all our outputs. This flexibility allows PLD Series amplifiers to drive (for example) four full-range loudspeakers or subwoofers; a high-power subwoofer and a bi-amplified speaker; a single high-power full-range loudspeaker and subwoofer combo; or multiple power-hungry subwoofers from a single, very high output mono-block.

Advanced Amplifier Technology
The PLD Series amplifiers use QSC fourth generation class-D power amp design in combination with a custom power stage utilizing a purpose-built output device. These innovative MOSFET device provide high voltage operation without needing a full bridge output and offer superior audio quality due to co-location of the semiconductors. Additionally, PLD amplifiers benefit from the PowerLight power supply, further enhanced with PFC (Power Factor Correction) that aligns the current waveform with the AC mains voltage waveform. PFC enables PLD Series amplifiers to draw current from the wall in an efficient and controlled manner resulting in power from a single standard AC breaker. Additionally, the PLD Series amplifiers offers multistage sleep modes, saving energy when possible without ever sacrificing performance. The result is a powerful and flexible platform that offers low weight and outstanding efficiency.

System Processing
The PLD Series Amplifiers also double as loudspeaker processors. The close integration of processing and amplification allows the DSP to monitor and respond to amplifier behavior, making dynamics processing accurate and effective. This synergistic approach employs both RMS and Peak Limiters that allow the combination of amplifier and loudspeaker to produce more output without being pushed to distortion or destruction.

In addition to the dynamics processing, the onboard DSP offers four channels of crossover filters, parametric EQ, and alignment delay—everything needed to optimize a loudspeaker system. PLD amplifiers also offer Intrinsic Correction, a combination of IIR and FIR Filtering and loudspeaker processing methodology. Intrinsic Correction compensates for the non-linearities in loudspeaker array and horn design and results in good performance from your QSC loudspeakers (sold separately).

Preset Wizardry
The on-board processing is managed and stored as presets, with 20 factory presets for the most common loudspeaker applications. For great customization, the built-in Preset Wizard streamlines amplifier setup and provides loudspeaker selection of passive loudspeakers (sold separately).

Space Efficient
With 4 channels of amplification plus drive rack signal processing in just 2RU, the PLD Series replaces equipment taking up as much as 3 times the rack space.

Simple To Use
With a dedicated front panel UI complete with LED meters and indicators, a 400 x 240 TFT color display, a rotary encoder and ergonomic navigation buttons, PLD amplifiers provide an intuitive interface for the user to control the system. The complete system can be set up in mere minutes.


  • Total power up to 5,000 watts
  • FAST (Flexible Amplifier Summing Technology™) drives most any loudspeaker system or configuration by distributing total amplifier power across 1, 2, 3, or all 4 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
  • 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
  • PowerLight universal switch mode power supply with PFC for efficiency, good audio performance, and low weight
  • Four input XLR connectors, and 6 NL-4 output connectors
  • Integrated front panel with channel select and mute buttons, input and output LED metering, 400 x 240 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 passive speakers

  • Distortion:
    • Typical:
      • 8 Ohms: 0.01 - 0.03%
      • 4 Ohms: 0.03 - 0.06%
    • Maximum: 4 - 8 Ohms, 1%
  • Frequency Response (8 Ohms):
    • 20Hz - 15kHz: ± 0.2 dB
    • 20Hz - 20kHz: ± 0.2 dB / -0.7 dB
  • Noise:
    • Unweighted Output, Unmuted: -101 dB
    • Weighted Output Muted: -109 dB
  • Gain (1.2V setting):
    • PLD4.2: 34 dB
    • PLD4.3, PLD4.5: 38.4 dB
  • Damping Factor: > 150
  • Input Impedance (balanced or unbalanced): > 10k Ohms
  • Maximum Input Level:
    • 3.9V Setting: 12.28V (+24 dBu)
    • 1.2V Setting: 3.88V (+14 dBu)
  • Controls & Indicators:
    • Front: Power , Channel MUTE Buttons, Channel SELECT Buttons, Channel Input Signal and CLIP LED Indicators, Channel Output and LIMIT LED Meters, Navigation Buttons (HOME, ENTER, EXIT, GAIN), Control Knob
    • Rear: AC Power Disconnect
  • Connectors:
    • Input: Female XLR
    • Output: NL4
  • Amplifier & 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 (W x H x D):
    • PLD4.2: 19 x 3.5 x 12 in | 48.3 x 8.9 x 30.5 cm
    • PLD4.3, PLD4.5: 19 x 3.5 x 16 in | 48.3 x 8.9 x 40.7 cm
  • Weight:
    • PLD4.2: 18.5 lbs | 8.4 kg
    • PLD4.3: 21 lbs | 9.5 kg
    • PLD4.5: 22 lbs | 10 kg
  • Power Matrix:
    PLD4.2 PLD4.3 PLD4.5
    Ohms Channels Burst Continuous Burst Continuous Burst Continuous
    4 600W 350W 1200W 625W 1600W 625W
    4 700W 400W 1400W 625W 2000W 1250W
    4 500W 400W 900W 625W 1200W 1150W
    2 1500W 650W 2500W 1250W 4000W 2100W
    2 1500W 800W 2000W 1250W 2400W 2250W
    2 1200W 800W 2400W 1250W 4000W 2250W
    1 2500W 1600W 5000W 2500W 7500W 3700W
    1 1700W 1600W 3500W 2500W 4500W 4250W
    1 2500W 1600W 5000W 2500W 7500W 4200W
    1 1600W 1500W 3500W 2500W 4500W 4200W

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