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 QSC PLD4.2 Processing Amplifier is ideal for production and live sound applications.
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.
- 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 Specifications
| PLD4.2 | PLD4.3 | PLD4.5 | ||
| Typical Distortion | 0.01–0.06% | |||
| Maximum Distortion | 1.0% | |||
| Frequency response | 20 Hz–15 kHz ±0.2 dB 20 Hz–20 kHz +0.2/-0.7 dB |
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| Noise: Unweighted Output Unmuted |
-101 dB | |||
| Noise: Weighted Output Muted |
-109 dB | |||
| Gain | 1.2V | 34.0 dB | 38.4 dB | 38.4 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 |
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Power Specifications
| PLD4.2 | PLD4.3 | PLD4.5 | |||||
| Peak | Continuous | Peak | Continuous | Peak | Continuous | ||
| 4 Independent Channels A, B, C, D |
8Ω | 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 |
8Ω | 1200 W | 800 W | 2400 W | 1250 W | 4000 W | 2250 W |
| 4Ω | 1500 W | 600 W | NR* | NR* | NR* | NR* | |
| 2Ω | NR* | NR* | NR* | NR* | NR* | NR* | |
| 2 Channel Parallel AB or CD Doubles Current |
8Ω | 500 W | 400 W | 1300 W | 1150 W | 1250 W | 1150 W |
| 4Ω | 950 W | 800 W | 2000 W | 1250 W | 2400 W | 2250 W | |
| 2Ω | 1200 W | 800 W | 2500 W | 1250 W | 4000 W | 2100 W | |
| 1 Channel 3CH Parallel ABC Triples Current |
8Ω | 500 W | 400 W | 1400 W | 1150 W | 1400 W | 1150 W |
| 4Ω | 950 W | 800 W | 2400 W | 2000 W | 2500 W | 2400 W | |
| 2Ω | 1800 W | 1200 W | 3500 W | 2500 W | 4500 W | 4100 W | |
| 1 Channel Bridged/Parallel AB+CD Doubles Current and Voltage |
8Ω | 1600 W | 1500 W | 3500 W | 2500 W | 4500 W | 4200 W |
| 4Ω | 2500 W | 1600 W | 5000 W | 2500 W | 7500 W | 4200 W | |
| 2Ω | NR* | NR* | NR* | NR* | NR* | NR* | |
| 1 Channel 4CH Parallel ABCD Quadruples Current |
8Ω | 500 W | 400 W | 1400 W | 1150 W | 1600 W | 1150 W |
| 4Ω | 1000 W | 800 W | 3000 W | 2500 W | 3000 W | 2300 W | |
| 2Ω | 1700 W | 1600 W | 5000 W | 2500 W | 5300 W | 4200 W | |
For complete specifications of power output distribution (single, bridged, parallel channels and all combinations), please refer to the product’s User Manual.
NR* = Not Recommended due to excessive current draw
BOLD = Optimal configuration for the load and channel count
Controls, Indicators and Connections
| PLD4.2 | PLD4.3 | PLD4.5 | |
| 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 | ||
| Input connectors | Female XLR | ||
| Output connectors | NL4 | ||
Weights and Dimensions
| PLD4.2 | PLD4.3 | PLD4.5 | |
| Product Dimensions (H×W×D) | 89 × 482 × 305 mm 3.5 × 19 × 12 in |
89 × 482 × 406 mm 3.5 × 19 × 16 in |
89 × 482 × 406 mm 3.5 × 19 × 16 in |
| Carton Dimensions (H×W×D) | 610 × 460 × 178 mm 24 × 18 × 7 in |
610 × 530 × 178 mm 4 × 20.9 × 7 in |
610 × 530 × 178 mm 24 × 20.9 × 7 in |
| Net Weight | 8.4 kg / 18.5 lb | 9.5 kg / 21 lb | 10 kg / 22 lb |
| Shipping Weight | 10 kg / 22 lb | 11.4 kg / 25 lb | 11.8 kg / 26 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 | ||
