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QSC GX5 Stereo Power Amplifier

GX Series amplifiers are ideal for professional entertainers who require maximum performance and portability on a limited budget.


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MSRP: Old Price $569.99 Discounted Price $449.99 Save : $120.00 (21%)
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MSRP: Old Price $569.99 Discounted Price $449.99 Save : $120.00 (21%)
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GX Series amplifiers are ideal for professional entertainers who require maximum performance and portability on a limited budget. QSC designers, headed by Pat Quilter, have optimized output and appearance while reducing raw material cost and weight. It's all here – dramatic styling, easy hookup and adjustments, excellent audio quality and QSC reliability.

The QSC G5 provides full performance for 500 watt (program) speakers, and maximum possible power is supplied to both 4 ohm and 8 ohm loads. The 700 watt (4 ohm) power of the GX5 is a perfect match for owners of popular 4 ohm loudspearers, such as dual woofers, two-way models, and multiple types of subwoofers.

Technical Notes

The GX5 uses a Class H system, based on key elements of the PLX Series, almost doubling power in the same size and weight. QSC design expertise allows the output devices to shift from low-power to high-power rails in less than a millionth of a second, ensuring that the output power is always right where it needs to be without excess loss.

This amplifier uses premium toroidal power transformers for reliable "mid-weight" performance. A variable-speed fan moves air crosswise through the amplifier, drawing cool air in over the power transformer, through the fan, and then over the heat sink. This keeps the transformer cool and allows a full size heat sink to fit in a down-sized chassis. As always, the amplifier is fully protected from the usual hazards of the trade, ensuring stable performance and long life.


GuardRail protection delivers full peak power while preventing detrimental overloads. During excessive clipping, or extreme overheating, GuardRail reduces gain just enough to preserve the integrity of the music, protect the speakers and keep the audience excited, without unprofessional distortion levels or shutdowns.

Subwoofer/Satellite Crossover

A subwoofer reduces strain on the full-range speaker, allowing it to play louder, or letting a smaller speaker do the same job. The GX Series supports this mode with a Crossover switch that splits the full-range input entering Ch 1, sending 20 Hz - 100 Hz to the sub (Ch 1) and 100 Hz - 20 kHz to the top box (Ch 2). The front panel gain controls balance the sub and top box, while GuardRail optimizes peak power into the sub and top individually, for greater musical impact and dynamic range.

•  Power levels matched to the most popular speakers used by entertainers
•  Optimized for maximum real-world headroom into 4 ohm and 8 ohm speaker systems
•  Inputs: XLR, 1/4" TRS and phono input connectors for compatibility with any source
•  Outputs: Speakon® combo accepts, 1/4" (TS) plugs or Speakon 2-pole and 4-pole plugs (connects 2 poles only). Binding posts support all other speaker wiring systems.
•  Minimum depth chassis (10.1" / 257 mm) fits in compact, inexpensive effects racks
•  Lightweight – less than 26 lbs (12.5 kg)
•  Detented gain controls for precise setting and matching of sensitivity
•  GuardRail™ automatically protects the amplifier and loudspeakers from damage due to temperature rise or overdrive without shutting down the show
•  Front panel LEDs monitor Power, Signal and Clipping
•  Subwoofer/Satellite crossover built-in
•   Specifications:
•  8 ohms / 1 kHz (both channels driven) 500 W
•  8 ohms / 1 kHz (single channels driven) 600 W
•  4 ohms / 1 kHz (both channels driven) 705 W
•  4 ohms / 1 kHz (single channels driven) 850 W
•  Distortion (typical) 20 Hz - 20 kHz, 1 dB below rated power: 8 ohms: less than 0.05%; 4 ohms: less than 0.1%
•  Signal to Noise (20 Hz - 20 kHz)  100 dB
•  Input Sensitivity 1.2 Vrms
•  Voltage Gain (8 ohms) 34.4 dB
•  Output Circuitry Class: 2 tier Class H
•  Power Requirements (1/8 power, pink noise at 4 ohms, 120V)  6A
•  Frequency Response 20 Hz - 20 kHz, +0, 1 dB
•  Dynamic Headroom (4 ohms) 2 dB
•  Damping Factor (8 ohms) 100
•  Input Impedance (ohms)  Greater than 20k (balanced)
•  Maximum Input Level +24 dB (16 Vrms)
•  Input Connectors (each channel) 3-pin XLR and 1/4" TRS, balanced, parallel; Phono, unbalanced
•  Output Connectors (each channel)  Speakon®, 1/4", Binding Posts
•  Amplifier and Load Protection Short circuit, open circuit, thermal, RF protection; Load protected against DC faults
•  Front Panel Controls and Indicators  Gain controls, 21 detents; Red Clip LEDs, proportional, 0.1% THD threshold; Green Signal LEDs, threshold -35 dB; Blue Power LED, AC on
•  Rear Panel Controls Full Range / Crossover switch; 100 Hz, 3rd order LP (sub), 2nd order HP (top)
•  Cordset 120V 50/60 Hz NEMA-15
•  Dimensions Height: 3.5" (89 mm) 2RU
•  Width: 19" (483 mm)
•  Depth: 10.1" (257 mm)
•  Weight Net: 26 lbs (12 kg)
•  Shipping: 31 lbs (14 kg)
•  Agency Approvals  UL, CE, RoHS/WEEE Compliant

Things You Will Get:

  • Power Amplifier Manual Power Cord

Great amps


I have 2 of these, excellent amps! Plenty powerful enough for mains & subs. Quiet & reliable....



Works for me


For small to medium events and the looks are great

Prime Time Music

Trinidad & Tobago


Can't wait to get another one!!!


This amp is great, use with peavey sub and crossover. Can't wait to get another!!!




A lot of Bang for the Buck


I DJ 30+ events per year, mostly weddings. This amp is Perfect for DJ events. I have owned mine for over a year. I constantly operate the amp up to the "clip" limit. It has not let me down. Stays cool even during outdoor summer 4+ hour parties. You just can't beat this amp for the price and wattage. I am very satisfied and would highly recommend it.

Eddie with Pa-Zazz Entertainment

Winston Salem, NC


more than you expect


mobile dj, small clubs.... use with ev forci double 15 speakers... looking to get another for ev subs...




Good Investment


It has paid for it's self over and over in the last two years

Blue Jay

Chi town


It did the perfect job for me.


Not bad, I'm gonna buy another one soon




GX5 Stereo Power Amplifier

4.6 7


Series GX Series
Other Features GuardRail protection technology
Model GX5
Information not available

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