QSC PLD4.2 4-Channel Digital Amplifier

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  • Regular price $1,529.00
7% GST included. Free Shipping above S$99.

With four flexible channels of up to 700 watts each, lightweight PowerLight universal power supply, DSP on-board for each channel, and all the right connectors, the PLD4.2 is ideal for production and live sound applications.


  • 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.
  • 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.
  • E Series Entertainment System DSP Tunings are now available for PLD processing amplifiers:

             - Visit the Amplifier Navigator Software to download and update

  • 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 highest efficiency, improved audio performance, and low weight.
  • Four input XLR connectors and six NL4 output connectors.
  • 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.
  • Preset Wizard simplifies amplifier configuration, providing selection from a list of the top selling passive loudspeakers.


General Specification

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 -101 dB
Noise: -109 dB
Weighted Output Muted
Gain 1.2V 34.0 dB
Damping factor >150
Input impedance >10 kΩ, balanced or unbalanced 
Maximum rms input level 3.9V 12.28 V (+24 dBu)
1.2V 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

Power Specifications

Peak  Continuous
4 Independent Channels
A, B, C, D
500 W 400 W
700 W 400 W
625 W  325 W
2 Channel BTL Bridged
A+B or C+D
Doubles Voltage
1200 W 800 W
1500 W 600 W
2 Channel Parallel
AB or CD
Doubles Current
500 W 400 W
950 W 800 W
1200 W 800 W
1 Channel 3CH Parallel
Triples Current
500 W 400 W
950 W 800 W
1800 W 1200 W
1 Channel Bridged/Parallel
Doubles Current and Voltage
1600 W 1500 W
2500 W 1600 W
1 Channel 4CH Parallel
Quadruples Current
500 W 400 W
1000 W 800 W
1700 W 1600 W
NR* = Not Recommended due to excessive current draw
BOLD = Optimal configuration fo rthe load and channel count


Controls, Indicators and Connections

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
Input connectors Female XLR
Output connectors NL4

Weights and Dimensions

Product Dimensions (H×W×D) 89 × 482 × 305 mm
3.5 × 19 × 12 in
Carton Dimensions (H×W×D) 610 × 460 × 178 mm
24 × 18 × 7 in
Net Weight 8.4 kg / 18.5 lb
Shipping Weight 10 kg / 22 lb
Agency approvals UL, CE, RoHS/WEEE compliant, FCC Class A (conducted and radiated emissions)
Carton contents Locking IEC cable, Quick Start Guide, USB cable