QSC GX3 Power Amplifier, 425W @ 4 Ohms

The QSC GX3 Power Amplifier matches power levels to the most popular speakers. Inputs: XLR, ¼-inch TRS and phono. Outputs: Speakon combo and binding posts.

QSC GX3 Power Amplifier Features

- 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 ¼-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 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

QSC GX3 Power Amplifier Specifications

- Power (Both Channels Driven):
  - 4 Ω: 425W
  - 8 Ω: 300W
- Distortion (1 dB below rated power, 1 kHz):
  - 8 Ω: less than 0.02%
  - 4 Ω: 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 (⅛ power, pink noise at 4 Ω, 120V): 6.3 A
- Frequency Response: 20 Hz–20 kHz, +0, -1 dB
- Dynamic Headroom (4 Ω): 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 ¼-inch TRS, balanced, parallel
  - Phono, unbalanced
- Output Connectors (each channel): Speakon, ¼-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)

Physical:
- Dimensions (W x H x D): 483 x 89 x 257 mm
- Weight: 12.1 kg