PowerLight 3 Series

2500 to 8000 watt, lightweight, 2RU amplifiers for use in the most
demanding concert and live-sound reinforcement applications.

Power, flexibility, pristine audio quality and legendary QSC reliability — the ultimate concert amplifiers.
The concert stage is the ultimate test of professional audio technology.	Concert audio performance has to be impeccable. Reliability, unshakable. Efficiency, unbeatable. Factory support, unstoppable. For decades, QSC has set the standards in every one of these mission critical dimensions. Top grossing concert performers are the most demanding clients in the world. There's no room for compromise among the professionals who provide the technical foundation that allows those artists to express their creativity. Time after time, tour after tour, show after show, these industry leaders stake their reputations — and their businesses — on QSC technology, without second chances or retakes. Night after night, venue upon venue across the globe, QSC professional audio systems do exactly what Pat Quilter and his team of engineers designed them to do – deliver. Ultimate Audio Performance One world class power supply, two output technologies. Over four decades of R&D, we've learned to take innovative leaps one at a time. Since PowerLight® remains the world's most efficient supply, we developed new output stages. PL340 & PL325: Ultimate Class H Technology We design for the total show: load-in to load-out and everything in between. That's why the 2-tier linear PL340 and PL325 not only have ruler-flat response into 8 ohm loads, but similar transparency and detail into 2 ohms.		PL380: Ultimate Class D Technology Class D amplifier design offers ultimate power conversion efficiency and entails greater complexity than linear topologies. It is also harder to master since it has more signal-conversion stages, each a source of errors that must be corrected. The PL380 more than doubles the output power and thermal capacity of our previous 2RU designs, but it looks and sounds "linear," whether on the bench or driving speakers. Rigorous testing and precise alignment of feedback networks produce stable closed-loop response. The modulator converts analog input signals into varying on-off ratios – the PL380's responds in under 5 nanoseconds. A crystal controlled, synchronized power supply and Class D clocks prevent interference between power stages. Our new Class D switching section uses a single pair of industrial strength devices that easily handle kilowatts of energy without extra complexity. Our painstakingly refined PCB design controls high frequency currents to prevent internal interference. A proprietary dynamic current limiter monitors power stress in the output devices, delivering the maximum power possible within safe operating limits. Output filtering is another key to ultimate audio performance. Proprietary winding techniques pack more copper on a smaller coil, for better efficiency and lower distortion.  Continuted on next page...
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