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QSC GX5 2-Channel PA Power Amplifier 500W

Item #67676
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List: $499.99
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QSC GX5 2-Channel PA Power Amplifier

The GX5 is 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 GX5 delivers just the right amount of power to the most popular speakers used by entertainers. Most loudspeaker manufacturers recommend an amplifier with power output equal to the speaker's "Program (Music) Power" rating or two times (2 x) the "Continuous (RMS) Power" rating.

The GX5 is ideal for speakers in the 300 watt (Program) range, while the GX5 provides full performance for 500 watt (Program) speakers. Both models supply maximum possible power to 4 ohm and 8 ohm loads. Owners of popular 4 ohm loudspeakers (dual-woofer, two-way models and many subwoofers) will find the 700 watt (4 ohm) power of the GX5 an ideal match.

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.

The GX5 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 GX Series amplifiers are 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.

  • 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 30 lbs (13.5 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
  • 8 ohms / 1 kHz (both channels driven) 500W
  • 8 ohms / 1 kHz (single channels driven) 600W
  • 4 ohms / 1 kHz (both channels driven) 700W
  • 4 ohms / 1 kHz (single channels driven) 850W
  • 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
  • Height: 3.5" (89 mm) 2RU, Width: 19" (483 mm), Depth: 10.1" (257 mm)
  • Weight - Net: 28 lbs (12.6 kg), Shipping: 32 lbs (14.6 kg)

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4.8 / 5.0
17 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Pros: Great Sound Quality,Couldn't ask for more,Accurate Controls,Good Power Output,Easy Setup

Bought this amp to power a pair of dual 15 JBL JRX's @ 4ohms and could not be happier. When i first set it all up in my room to test it i couldn't go past the half mark on the mixers main volume level. It was just too LOUD!!! Amp has tons of power, sounds crystal clear, runs very quiet, and stays cool. Just wish you could bridge this amp but oh well.
April 9, 2010
Wow This Amp's got major power
Pros: Small and powerful,Good Power,Durable,Clean Sound,Easy To Set Up,Accurate Controls
Cons: None

This is a great amp. It has 700 watts at 4 ohms perfect to power a full range speaker with a dual 15inch woofer. I have it power 2 EV force 125's and they take 600 watts cont... this throw 700 at them its just great for the price. For [$] bucks nothing i mean nothing is comparable. Its also QSC you cant go rong with them they even back you up with a 6 year warranty free.
June 22, 2008
Best Bang for your BUCK$
Pros: Good Power,Durable,Easy To Set Up,Clean Sound,Accurate Controls

I use this amp as a traveling VJ/DJ. The power and sound quality is outstanding for such an affordable unit. Other DJ's in my crew are highly considering buying this amp for their rigs.
November 14, 2008
It Makes Sense!
Pros: Good Power,Clean Sound,Easy To Set Up,Durable,Accurate Controls

I'm not going to list specs. You can find them on your own. What I will say is if you're looking for some good power for a good price then you'll want to get the GX5. Common sense puts this amp at the top of the list. I've used the same Peavey 2000 amps for the last 15 years and had no problems. They are rock solid and I would put them next to any amp or brand. I would also say for the money vs. power & weight I would buy the GX5. In fact I'll be purchasing a second one as soon as I'm finished here. Just buy it!
June 4, 2009
i would buy this product again
Pros: Good Power,Accurate Controls,Easy To Set Up,Clean Sound

the best
August 14, 2009
Pros: Good Power,Easy To Set Up,Durable,Clean Sound

September 9, 2009
over 6 years ago
Pros: Clean Sound,Easy Setup,Light Weight,Durable,Great Sound Quality,Good Power Output,Never breaks a sweat,Accurate Controls

I purchased this amplifier to put in my DJ rack and to replace my older Peavey CS-1200 which was supposed to be of greater power output than the GX-5. Much to my surprise, I had to turn the GX-5 volume level down half way and my mixer volume level cut by half of my normal operating levels just to get the same volume as my Peavey was at FULL volume. The GX-5 is also less than 1/3 the weight of my old Peavey. I could not believe the sound quality that I heard from the GX-5 verses my Peavey CS-1200. INCONCEIVABLE! Don't knock the price cause this amp ROCKS!
January 28, 2010
Extreamly satisfied with this amp.
Pros: Multiple inputs,Multiple Speaker Outputs,Good Power Output,Great Sound Quality,Lightweight
Cons: None

I purchased this amp several years ago, and it gets used hard. It still performs as the day I got it. I really like the fact that it has multiple inputs and speaker outputs. It's lightweight and very powerful. You can't go wrong with this amp for the price. Highly recommended. GX7 is in my picture for my subs!
February 6, 2012
Pros: Great Sound Quality,Good Power Output,Energy Efficient,Easy To Set Up

May 19, 2013
Great Amp, especially at this price
Pros: Size,Good Power
Cons: No Bridged Options,Wish It Came In Black

Had Crown amps for years before this, never had any problems. Was looking to switch to QSC for awhile and when this model came out it was the perfect time! Run Yamaha Club Series 15" and the sound is superb. Bought a second model to run my 12" speakers also.
July 12, 2008
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 4 questions Browse 4 questions and 5 answers
D.J. G - BIZZEL on Oct 13, 2011
BEST ANSWER: 700 Watts in 4 ohms / 1 kHz (both channels driven) .
850 Watts in 4 ohms / 1 kHz (single channels driven).
HELLO, I would like to confirm that the power supply in Hong Kong is 220V
it this device have the same power supply?
ISAAC on May 29, 2011
BEST ANSWER: We can get you the mixer with 220V output. Give us a call for more information.
the wattage given for this product is it per channel?
null on Mar 26, 2011
BEST ANSWER: •8 ohms / 1 kHz (both channels driven) 500W
•8 ohms / 1 kHz (single channels driven) 600W
•4 ohms / 1 kHz (both channels driven) 700W
•4 ohms / 1 kHz (single channels driven) 850W
how many qsc gx5 do i need to push 8 jbl jrx 125>???or do i need something stronger>>??
dj alex on Oct 1, 2010
BEST ANSWER: Remember that your cab is a 4ohm unit. I would match watts to watts and use 2 speakers per amp
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