QSC GX3 500w Power Amplifier (Factory Re-Certified)

  • $252.19


  • Power levels matched to the most popular speakers used by entertainers
  • Optimized for maximum real-world headroom into 4- and 8-ohm speaker systems
  • Inputs: XLR, 1/4-inch TRS and phono input connectors for compatibility with any source)
  • Outputs: Speakon® combo accepts 1/4-inch (TS) plugs or Speakon 2- and 4-pole plugs (connects 2 poles only). Binding posts support all other speaker wiring systems
  • Minimum depth chassis (10.1-inch / 257 mm) fits in compact, inexpensive effects racksl
  • 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
  • Stereo, bridge, or parallel operating modes
  • Subwoofer/satellite crossover built-in
OUTPUT POWER PER CHANNEL, both channels driven
8 ohms / 1 kHz 300 W
4 ohms / 1 kHz 425 W
OUTPUT POWER PER CHANNEL, single channel driven
8 ohms / 1 kHz 350 W
4 ohms / 1 kHz 500 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
Output Circuitry Class B
Power Requirements (1/8 power, pink noise at 4 ohms, 120V) 6.3 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-inch TRS, balanced, parallel
Phono, unbalanced
Output Connectors (each channel) Speakon®, 1/4-inch, 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)
Carton Dimensions (H×W×D) 24” x 15” x 10.1”
Shipping Weight 29.1 Lbs
Agency Approvals UL, CE, RoHS/WEEE Compliant
AC Current and Heating, 120 VAC (multiply current by 0.5 for 230 VAC)
Operating Condition AC amps BTU/hour
Idle 0.2 44
8 + 8 ohms, 1/8 power* 4.1 904
8 + 8 ohms, 1/3 power** 6.1 1160
8 + 8 ohms, full power*** 9.75 1109
4 + 4 ohms, 1/8 power* 6.3 1515
4 + 4 ohms, 1/3 power** 9.4 2105
4 + 4 ohms, full*** 15.0 2297
*1/8 power represents typical maximum operating conditions
**1/3 power represents over-driven program levels
***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

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