Used QSC GX Series
Used QSC GX Series amplifiers are professional power amplifiers designed to deliver maximum performance and portability for entertainers working within a budget. The range includes models optimised for real-world headroom into 4 and 8-ohm speaker systems, with a built-in subwoofer/satellite crossover and protective GuardRail technology. Browse the second-hand QSC GX Series listings available below to find the right model for your setup.
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QSC GX Series specifications
| Brand | QSC |
| Segment | Audio |
About the QSC GX Series
The QSC GX Series comprises lightweight professional power amplifiers aimed at entertainers who need reliable, portable amplification without high cost. Each amplifier in the range accepts XLR, quarter-inch TRS and phono inputs for compatibility with virtually any source, while outputs include Speakon combo connectors and binding posts to support a wide variety of speaker wiring systems. The shallow chassis (10.1 inches / 257 mm deep) fits compact effects racks, and the GX3 and GX5 each weigh under 26 lb, with the GX7 coming in at just 15.5 lb. Detented gain controls allow precise sensitivity matching, GuardRail protection guards both amplifier and loudspeakers against overdrive or temperature rise without interrupting operation, and front panel LEDs monitor power, signal and clipping at a glance.
QSC GX Series — buyer FAQs
What is the QSC GX Series and who is it designed for?
The QSC GX Series is a range of lightweight professional power amplifiers built for entertainers who need reliable portable amplification on a limited budget. Models in the range are optimised for real-world headroom into 4-ohm and 8-ohm speaker systems, include a built-in subwoofer/satellite crossover, and feature GuardRail protection that guards the amplifier and connected loudspeakers against overdrive or temperature rise without interrupting a performance.
Who makes the GX Series and where does it sit in the QSC range?
The GX Series is made by QSC, an American audio, video and control manufacturer founded in 1968 and headquartered in Costa Mesa, California. QSC is widely known across professional audio for power amplifiers, loudspeakers and the Q-SYS platform. The GX Series sits at the portable, budget-conscious end of the QSC amplifier lineup, aimed specifically at working entertainers rather than fixed-installation or large-scale touring applications.
What input and output connections does the QSC GX Series support?
GX Series amplifiers accept XLR, quarter-inch TRS and phono inputs, making them compatible with virtually any source. On the output side, Speakon combo connectors accept quarter-inch TS plugs or Speakon 2-pole and 4-pole plugs, while binding posts accommodate all other speaker wiring systems. This combination covers most speaker configurations a working entertainer is likely to encounter.
How portable is the QSC GX Series for live use?
The GX Series is notably compact and light for a professional power amplifier. The chassis is only 10.1 inches (257 mm) deep, fitting standard compact effects racks. The GX3 and GX5 each weigh under 26 lb (12.5 kg), and the GX7 comes in at just 15.5 lb (7 kg), making the range practical for regular load-in and load-out use.
What should I check when buying a used QSC GX Series amplifier?
Check which model in the range (GX3, GX5 or GX7) is being sold, as weight and power level differ between them. Confirm the front panel LEDs, detented gain controls and GuardRail protection all function correctly, and inspect the Speakon combo outputs and binding posts for wear. Each listing on this page carries a 21-day warranty covering major functional faults; the buying guide at 10kused.com/used-av-equipment-guide covers the full purchase process.
