The QSC GX3 425-watt power amplifier gives your speakers the power they need while giving you the efficiency and protective features you want for easy operation and peace of mind. The GX3 uses advanced components for both light weight and reliability. Its Guardrail protection allows delivery of peak power while preventing overloads. It's equipped with a crossover switch, so adding a subwoofer to your system is a snap. Optimized for 4- and 8-ohm speakers, this amp also fits perfectly into popular racks, and its lightweight design (less than 30 lbs.) makes the GX3 incredibly easy to transport.

• 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 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
• Power at 4 ohms/1kHz (both channels driven): 425W
  
• Distortion (typical): 20Hz-20kHz, 1dB below rated power
  
• Dynamic headroom (4 ohms): 2dB
  
• Input impedance (ohms): reater than 20k (balanced)
  
• Maximum input level: +24 dB (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 -35dB; blue power LED, AC on
  
• Rear panel controls: Full range/crossover switch
  
• 100Hz, 3rd order LP (sub), 2nd order HP (top)
  
• Dimensions" Height: 3.5"/2RU;width: 19"; depth: 10.1"
  
• Net weight: 27 lbs.

* 230V 16.5 lb (7.5 kg)

Specifications

• Output power per channel
• 8 ohms / 1 kHz (both channels driven) 300 W
• 8 ohms / 1 kHz (single channel driven) 350 W
• 4 ohms / 1 kHz (both channels driven) 425 W
• 4 ohms / 1 kHz (single channel driven) 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)
• Product Dimensions (H×W×D) 89 × 483 × 257 mm
• 3.5 × 19 × 10.1 in
• Carton Dimensions (H×W×D) 610 × 380 × 153 mm
• 24 × 15 × 6 in
• Net Weight 12.1 kg / 27 lb
• Shipping Weight 13.2 kg / 29.1 lb