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QSC GX7 2-Channel 725W PA Power Amplifier

Item #77754
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List: $749.99
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QSC GX7 2-Channel Power Amplifier

The Ultra Powerful and Affordable Amp Delivers Big Power!

The GX7 amplifier is ideal for professional entertainers who require maximum performance and portability on a limited budget. The GX7 amplifier delivers just the right amount of power to the most popular speakers used by entertainers. Typically, 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 GX7's 1000 watts will very capably power many of today's popular subwoofers or two typical 8 ohm speakers per channel.

The GX7 adds the road-proven PowerLight supply to the Class H output section, for more overall output power and additional weight savings. The result is one of the highest power-to-weight ratios in the industry. A low-noise variable-speed fan with rear-to-front airflow keeps amplifiers and racks cool.

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.

A subwoofer reduces strain on the full-range speaker, allowing it to play louder, or letting a smaller speaker do the same job. The GX7 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. 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 - Only 15.5 lbs (7 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) - 725 W
  • 8 ohms / 1 kHz (single channel driven) - 800 W
  • 4 ohms / 1 kHz (both channels driven) - 1000 W
  • 4 ohms / 1 kHz (single channel driven) - 1200 W
  • Distortion (1 dB below rated power, 1 kHz) - 8 ohms: less than 0.02%, 4 ohms: less than 0.05%
  • Signal to Noise (20 Hz - 20 kHz) - 100 dB
  • Input Sensitivity - 1.2 Vrms
  • Power Requirements (1/8 power, pink noise at 4 ohms, 120V) - 10.1 amps
  • Frequency Response - 20 Hz - 20 kHz, +0, -1 dB
  • Dynamic Headroom (4 ohms) - 2 dB
  • 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
  • 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

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4.0 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Excellent power at an unbelievable price
Pros: Accurate Controls,Great Sound Quality,Easy To Set Up,Runs Cool,Good Power Output,Lightweight
Cons: Limited Functions

I just picked this amp up last week and used it at my first gig last night. (it was the 2nd gx7, the first one was DOA and had to exchange it, weird)I'm using it to power jbl mrx515 cabs and it is a great match. It puts out so much power to them, i was afraid to push it to clipping they were so loud. @ 725 watts x2, it's amazing how they pack so much power into a 15.5 lb frame. And for the price, i don't know if you find anything else close combined with the qsc quality. Great value/performance ratio. The specs s/n ratio, thd, and damping could be better, but you'll have to pay hundreds more for the powerlight amps to get studio quality. For my use as a mobile dj, it worked just fine for me and the sound was amazing. This should provide years of trouble-free use.
March 5, 2011
Clean Power
Pros: Good Power Output,Great Sound Quality,Easy To Set Up,Energy Efficient

I just bought this amp, I have it hooked up to an Alesis 3630, dbx 215s eq, & a BBE 482. It's all pushing a pair of JBL JRX Dual 15's! This amp is powerful. I had i cranked up for over an hour & it did it's job. I appreciate the built in fan! My amp rack got hot! Luckily I have a back up fan! You can't go wrong with QSC!!!
November 8, 2011
Great Amp
Pros: Good Power Output,Great Sound Quality

I use this amp to power stage monitors. It is light and sounds great.
September 30, 2012
over 3 years ago
QSC GX7 725 W 8 OHMS
Pros: Energy Efficient,Good Power Output,Great Sound Quality

I have 2 amp to power stage 4 cerwin vega JE-36b jr bass , sounds great it's working perfect...
April 9, 2014
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 6 questions Browse 6 questions and 6 answers
Can you run this amp in briged mono?
dmad on Jun 13, 2013
BEST ANSWER: Yes, the Qsc GX7 can be bridged mono:
8 ohms / 1 kHz (single channel driven) - 800 W.
4 ohms / 1 kHz (single channel driven) - 1200 W.
I am currently using for mobile DJ work a Mackie M-2600 power amp to power a pair of Electro Voice SX250 speakers and for bigger venues I also run a pair of EV Eliminator I subs. The Mackie does a great job, but it weighs a ton! (and I'm not getting any younger!!) Would the QSC GX7 handle this application? Can you suggest any other possible light weight PA amps that would be comparable or better than my Mackie? Thanks!
DJ BOB on Aug 2, 2012
BEST ANSWER: Yes this would be a great amplifier to choose. It is very light weight and good quality.
I have (2)behringer 2520's 2,000watt each speakers 500watt continuous. Will this amp work perfectly running these speakers?
djmadrix on Feb 18, 2012
BEST ANSWER: Yes, The QSC GX7 will work perfectly with your Behringer speakers.
Can this amp push a pair of JBL JRX 125's?
null on Oct 11, 2011
BEST ANSWER: Yes. It will give you more than enough headroom.
how bigger area will these speakers cover,give me a square footage.
Geno on Sep 20, 2011
BEST ANSWER: Great question. These speakers are a little different in area coverage. Please contact us directly for a sure answer. Thank you

Is this power amp rated for 230V mains in Australia or only 110-120V?
Alex on Mar 15, 2011
BEST ANSWER: The rate on this amp is 120V.
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