QSC GX3 Power Amplifier

The GX3 uses the latest evolution of the QSC Grounded Collector output system, for optimum cooling of the critical power transistors. 

A true Class B biasing system combines maximum thermal efficiency with excellent audio performance ideal for speakers in the 300 W range. 

• 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" TRS and phono input connectors for compatibility with any source
• Outputs: Speakon® combo accepts 1/4" (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" / 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)

SPECIFICATION:

General

• 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" 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)

Physical & Dimensions 

• Height:  89 mm 2RU
• Width:  483 mm
• Depth:  257 mm
• Net Weight:  12.1 kg
• Shipping Weight:  14.1 kg

Manufacturer: QSC