QSC GX7 Entertainer Power Amplifier

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£578.00 RRP £680.27 (including VAT @ 20%)

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30 day money back guarantee included

30 day money back guarantee included

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The product price includes a one year warranty and 30 day money back guarantee.

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Product Ref: 21158

  • Ideal for Speakers in the 500W (Program) Range
  • QSC Grounded Collector Output for Optimum Cooling
  • Premium Toroidal Power Transformers
  • GuardRail Protection Against Overloads
  • Easy Hook-Up

QSC GX7 Entertainer Power Amplifier

The QSC GX7 Power Amp is ideal for professional entertainers who require good performance on a reasonable budget. The power levels are matched to the most popular speakers used by entertainers giving real-world headroom into 4 and 8 ohm speaker systems. This lightweight, easy to use power amp provides excellent audio quality and reliability.

Product Ref: 21158

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  • 15.9%
  • £20.16
  • £725.76
Pay by Finance

To make it as easy as possible for you to get the gear you want, we offer a range of instant finance options. If you spend £250 or more online, you can choose to pay over 48, 36 or 24 months. The majority of decisions are given instantly, so you could get your new gear sooner than you thought!

Representative Example

To help you understand how our finance options work, the examples below are based on a total order value of £250:

Finance APR Deposit to Pay Payments Total Payable
Classic Credit 48 Months 14.9% 14.9% No Deposit 48 months: £6.83
Final payment: £6.83
No settlement fee
Classic Credit 36 Months 15.9% 15.9% No Deposit 36 months: £8.65
Final payment: £8.65
No settlement fee
Classic Credit 24 Months 18.9% 18.9% No Deposit 24 months: £12.41
Final payment: £12.41
No settlement fee

How to Apply

Applying for finance couldn't be easier - if your order totals £250 or more, simply proceed through the checkout as normal, then select Pay by Finance on the payment page, then click the orange APPLY FOR INSTANT FINANCE button. This will start your application with V12 Retail Finance, our finance partner, and completing this form should take approximately 10 minutes.

You should get an instant answer on whether your application has been successful, though in some rare cases V12 may need to look at the application in more detail.

Please note: This is only available on orders placed via the website and is not available in store or via phone currently.

Full Description

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GX Series

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 optimised output and appearance while reducing raw material cost and weight. It's all here - dramatic styling, easy hook-up and adjustments, excellent audio quality and QSC reliability.


GX amplifiers deliver 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 provides full performance for 500 watt (Program) speakers.

Thermal Efficiency

The GX7 uses a Class H system, based on key elements of the PL Series, (PLX, PL3, CX, DCA) 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 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 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.

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 optimises 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 7.5 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

Output Power Per Channel:

  • 8 ohms / 1kHz (both channels driven): 725W
  • 8 ohms / 1kHz (single channel driven): 800W
  • 4 ohms / 1kHz (both channels driven): 1000W
  • 4 ohms / 1kHz (single channel driven): 1200W


  • Distortion (1dB below rated power, 1kHz): >0.02 at 8 ohms, >0.05 at 4 ohms
  • Signal to Noise (20Hz - 20kHz): 100dB
  • Input Sensitivity: 1.2 Vrms
  • Voltage Gain (8 ohms): 36.1dB
  • Output Circuitry: 2-tier Class H
  • Frequency Response: 20Hz - 20kHz, +0, -1dB
  • Dynamic Headroom (4 ohms): 2dB
  • Input Impedance: Greater than 20k ohms (balanced)
  • Maximum Input Level: +24dB (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 below clipping, Blue POWER LED, AC on
  • Rear Panel Controls: Full Range / Crossover switch 100 Hz, 3rd order LP (sub), 2nd order HP (top)
  • Dimensions: HWD 3.5" (89 mm) 2RU x 19" (483 mm) x 10.1" (257 mm)
  • Weight: 120V model: Net: 15.5 lb (7 kg), Shipping: 20.5 lb (9.3 kg) / 230V model: Net: 16.5 lb (7.5 kg), Shipping: 21.5 lb (9.75 kg)
  • Agency Approvals: UL, CE, RoHS/WEEE Compliant

AC Current and Heating, 120 VAC(multiply current by 0.5 for 230 VAC) GX7
Operating Condition AC amps BTU/hour
Idle 0.6 82
8 + 8 ohms, 1/8 power 1 6.7 1169
8 + 8 ohms, 1/3 power 2 13.3 1807
8 + 8 ohms, full power 3 26.5 2167
4 + 4 ohms, 1/8 power 1 10.1 1963
4 + 4 ohms, 1/3 power 2 18.5 2612
4 + 4 ohms, full power 3 40 4478
1 1/8 power represents typical maximum operating conditions, 2 1/3 power represents overdriven program levels, 3 Full power is breaker limited to short periods For 230 V, multiply AC current by 0.5 For 100 V, multiply AC current by 1.25