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725 W/CH @ 8 Ohms Power Amplifier


QSC's GX Series amplifiers are ideal for professional entertainers who require maximum performance and portability on a limited budget.
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List Price: $749.99
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QSC's GX Series amplifiers are ideal for professional entertainers who require maximum performance and portability on a limited budget.  The hallmarks of the QSC brand - professional audio quality, meticulous engineering, precision manufacturing and long-term reliability - are all intrinsic to GX.  Add contemporary styling, multiple input/output options, light weight, and advanced protection circuitry, and the GX Series represents real value.

The GX7 power amplifier outputs 725 watts into an 8 ohm load, and adds the road-proven PowerLight supply to the Class H output section for more overall output power and additional weight savings.  A low-noise variable-speed fan with rear-to-front airflow keeps amplifiers and racks cool, and the GX7's 1,000 watts will capably power many of today's popular subwoofers (or two typical 8 ohm speakers per channel).

GuardRail protection delivers full peak power while preventing detrimental overloads, excessive clipping, or extreme overheating, and reduces gain just enough to preserve the integrity of the music, protect the speakers and keep the audience excited, without unprofessional distortion 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 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.  GuardRail optimizes peak power into the sub and top individually, for greater musical impact and dynamic range.

QSC GX7 Features: 

  • 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 orSpeakon 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 - 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

QSC GX7 Specifications:

  • Watts per channel:
    • 8 ohms / 1 kHz (both channels driven): 725 W
    • 8ohms / 1 kHz (single channel driven): 800 W
    • 4 ohms / 1 kHz (both channelsdriven): 1000 W
    • 4 ohms / 1 kHz (single channel driven): 1200 W
  • Distortion (1 dB below rated power, 1kHz):
    • 8 ohms: less than 0.02%
    • 4ohms: less than 0.05%
  • Signal to Noise (20 Hz - 20 kHz): 100 dB
  • Input Sensitivity: 1.2 Vrms
  • Voltage Gain (8 ohms): 36.1 dB
  • Output Circuitry: 2-tier Class H
  • Power Requirements (1/8 power, pink noise at 4 ohms, 120V): 10.1A
  • 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 (eachchannel): 
    • 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 andIndicators: 
    • Gain controls, 21 detents
    • RedClip 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)
  • Dimensions (HxWxD): 3.5" 2RU x 19" x 10.1" (89 x 483 x 257 mm)
  • Net Weight: 15.5 lbs (7 kg)
  • Shipping Weight: 20.5 lbs (9.3 kg)
  • Agency Approvals: UL, CE, RoHS/WEEE Compliant
  • Operating Condition:
    • Idle: 0.6 A, 82 BTU/hr
    • 8 + 8 ohms, 1/8power*: 6.7 A, 1169 BTU/hr
    • 8 + 8 ohms, 1/3 power**: 13.3 A, 1807BTU/hr
    • 8 + 8 ohms, full power***: 26.5 A, 2167 BTU/hr
    • 4 + 4 ohms,1/8 power*: 10.1 A, 1963 BTU/hr
    • 4 + 4 ohms, 1/3 power**: 18.5A, 2612 BTU/hr
    • 4 + 4 ohms, full power***: 40 A, 4478BTU/hr
      *1/8 power represents typical operating conditions
      **1/3 power represents peak program levels
      ***Full power is breaker limited to short periods

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