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  • 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 two poles only). Binding posts support all other speaker wiring systems
  • Minimum depth chassis (10.1" / 257 mm) fits in compact, inexpensive effects racks
  • Lightweight - GX3 and GX5 less than 26 lb (12.5 kg). GX7 only 15.5 lb (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

* 230V 16.5 lb (7.5 kg)

QSC GX5 500 watts/ch at 8Ω, 700 watts/ch at 4Ω.

$579.99Price
SPECIFICATIONS GX3 GX5 GX7
  Output power per channel
8 ohms / 1 kHz (both channels driven) 300 W 500 W 725 W
8 ohms / 1 kHz (single channel driven) 350 W 600 W 800 W
4 ohms / 1 kHz (both channels driven) 425 W 700 W 1000 W
4 ohms / 1 kHz (single channel driven) 500 W 850 W 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 V rms
Voltage Gain 32.2 dB 34.4 dB 36.1 dB
Output Circuitry Class B 2-tier Class H 2-tier Class H
Power Requirements (1/8 power, pink noise at 4 ohms, 120V) 6.3 A 6 A 10.1 A
Frequency Response 20 Hz–20 kHz, +0, -1 dB
Dynamic Headroom (4 ohms) 2 dB
Input Impedance Greater than 20 kΩ (balanced)
Maximum Input Level +24 dBu (16 V rms)
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 Height: 3.5" (89 mm) 2RU
Width: 19" (483 mm)
Depth: 10.1" (257 mm)
Weight Net: 27 lb (12.1 kg)
Shipping: 31 lb (14.1 kg)
Net: 28 lb (12.6 kg)
Shipping: 32 lb (14.6 kg)
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)
GX3 GX5 GX7
Operating Condition AC amps BTU/hour AC amps BTU/hour AC amps BTU/hour
Idle 0.2 44 0.3 60 0.6 82
8 + 8 ohms, 1/8 power 1 4.1 904 3.3 734 6.7 1169
8 + 8 ohms, 1/3 power 2 6.1 1160 8.5 1456 13.3 1807
8 + 8 ohms, full power 3 9.75 1109 16.2 1891 26.5 2167
4 + 4 ohms, 1/8 power 1 6.3 1515 5.8 1160 10.1 1963
4 + 4 ohms, 1/3 power 2 9.4 2105 11.2 2162 18.5 2612
4 + 4 ohms, full power 3 15.0 2297 24.5 3754 40 4478

1 1/8 power represents typical maximum operating conditions
2 1/3 power represents over-driven program levels

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