Used QSC PLX series
Used QSC PLX Series professional power amplifiers deliver up to 3,400 watts in a compact 2RU chassis weighing just 21 lbs, combining the exclusive PowerWave technology for powerful bass and low distortion with a studio-quality noise floor. Available second-hand from sellers worldwide, scroll down to browse current used QSC PLX Series listings.
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QSC PLX series specifications
| Brand | QSC |
| Segment | Audio |
About the QSC PLX series
The QSC PLX Series is a line of professional power amplifiers built around QSC's exclusive PowerWave switching power supply, which charges supply rails 230,000 times per second through an ultra-low impedance circuit to deliver chest-pounding bass and crystal-clear highs while reducing wasted heat. The chassis measures just 13 inches deep and 21 lbs in a 2RU form factor, making it compatible with any standard rack. Ultra-low distortion of 0.03% THD at 8 ohms and a noise floor of -107 dB underpin studio-quality audio. Class H output stages on select models reduce AC power draw and heat by 40%, and an Advanced Thermal Management System keeps the amplifier running reliably under demanding conditions. Inputs include both 1/4-inch TRS and XLR connectors, with Speakon and shock-proof binding post outputs. Selectable clip limiters, subsonic filters, and a variable-speed fan complete the feature set.
QSC PLX series — buyer FAQs
What is the QSC PLX Series and what kind of power output does it deliver?
The QSC PLX Series is a line of professional power amplifiers offering up to 3,400 watts in a 2RU chassis. The series uses QSC's exclusive PowerWave switching power supply, which charges supply rails 230,000 times per second through an ultra-low impedance circuit, supporting bass performance and low distortion. The chassis is 13 inches deep and weighs 21 lbs, fitting into any standard rack.
Who makes the PLX Series and how does it fit into QSC's amplifier range?
The PLX Series is made by QSC, an American audio, video and control manufacturer founded in 1968. Within QSC's amplifier lineup, the PLX Series shares the PowerWave switching power supply technology with the company's higher-tier PowerLight Series, positioning it as a professional-grade option that carries over key power supply engineering from that award-winning line.
What are the key technical specifications of the QSC PLX Series?
The PLX Series measures 0.03% THD at 8 ohms and achieves a noise floor of -107 dB. Select models (2402, 3002 and 3402) use Class H output stages to reduce AC power draw and heat by 40%. Inputs are both 1/4-inch TRS and XLR, outputs are Speakon and shock-proof binding posts. A variable-speed fan, selectable clip limiters and subsonic filters are also included.
What should I check when buying a used QSC PLX Series amplifier?
On a used PLX Series unit, confirm which model number it is, since power ratings and Class H output vary across the range. Check that both input types (TRS and XLR) and all outputs (Speakon and binding posts) are functional, and that the variable-speed fan operates correctly. Used listings on this page vary by condition and included accessories. Every 10K Used listing carries a 21-day warranty covering major functional faults; full details are in the buying guide at 10kused.com/used-av-equipment-guide/.
