QSC GX5 Stereo Power Amplifier

Maximum performance and portability with very flexible I/O.

The QSC GX5 Stereo Power Amplifier is ideal for professional entertainers who require maximum performance and portability on a limited budget. QSC designers, headed by Pat Quilter, have optimized output and appearance of the rackmountable GX5 while reducing raw material cost and weight. The GX5 power amplifier provides full performance for 500 watt (Program) speakers and supplies maximum possible power to 4 ohm and 8 ohm loads. Owners of popular 4 ohm loudspeakers (dual-woofer, two-way models and many subwoofers) will find the 700 watt (4 ohm) power of the GX5 an ideal match.

The GX5 power amp uses a Class H system, based on key elements of the PLX Series, almost doubling power in the same size and weight. QSC design expertise allows the output devices to shift from low-power to high-power rails in less than a millionth of a second, ensuring that the output power is always right where it needs to be without excess loss.

QSC GX5 Stereo Power Amplifier Features:

Power levels matched to the most popular speakers used by entertainers
Optimized for maximum real-world headroom into 4 and 8 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 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 — less than 26 lbs (12.5 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 rating:
8 / both channels driven / 1 kHz: 500 W
8 / single channel driven / 1 kHz; 600 W
4 / both channels driven / 1 kHz; 700 W
4 / single channel driven / 1 kHz; 850 W
2 / both channels driven / 1 kHz: 350 W

Distortion (typical): 20 Hz - 20 kHz: 1 dB below rated power 8 : less than 0.05% / 4 : less than 0.1%
Signal to Noise: (20 Hz - 20 kHz) 100 dB
Input Sensitivity: 1.2 Vrms
Voltage Gain (8 ): 34.4 dB
Output Circuitry: 2-tier Class H
Power Requirements (1/8 power, pink noise at 4 , 120 V):6A
Frequency Response: 20 Hz - 20 kHz, +0, 1 dB
Dynamic Headroom (4 ): 2 dB
Damping Factor: 100
Input Impedance ( ): Greater 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 -35 dB
Blue Power LED, AC on
Rear Panel Controls: Full Range / Crossover switch
100 Hz, 3rd order LP (sub), 2nd order HP (top)
Dimensions (HWD): 3.5" (2RU) x 19" x 10.1" (89 mm x 483 mm x 257 mm)
Weight Shipping / Net: 31 (14 kg) / 26 lbs (12 kg)
Agency Approvals: UL, CE, RoHS/WEEE compliant