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QSC GX3 Stereo Power Amplifier

Brand: QSC
Product Code: GX3
Availability: In Stock
Ex Tax: AED1,500.00

Maximum performance at a modest price plus flexible I/O.

The QSC GX3 Stereo Power Amplifier is ideal for professional entertainers who require maximum performance and portability on a limited budget. QSC designers have optimized output and appearance of the GX3 power amp while reducing raw material cost and weight. The rackmount GX3 power amplifier is ideal for speakers in the 300W (Program) range and supplies maximum possible power to 4 ohm and 8 ohm loads. 

The GX3 power amp uses the latest QSC Grounded Collector output system for optimum cooling of the critical power transistors. The GX3 power amp's true Class B biasing system combines maximum thermal efficiency with excellent audio performance.


Power levels matched to the most popular speakers used by entertainers

Optimized for maximum real-world headroom into 4Ω and 8Ω 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


GX3 Stereo Power Amplifier

Power Rating:

8Ω / both channels driven / 1 kHz: 300 W

8Ω / single channel driven / 1 kHz: 350 W

4Ω / both channels driven / 1 kHz; 425 W

4Ω / single channel driven / 1 kHz; 500 W

2Ω / both channels driven / 1 kHz; 200 W

Distortion (typical): 20 Hz - 20 kHz: 1 dB below rated power 8Ω: less than 0.05% / 4Ω: less than 0.1%

Signal to Noise: (20 Hz - 20 kHz) 100 dB

Input Sensitivity: 1.2 Vrms

Voltage Gain: (8Ω) 32.2 dB

Output Circuitry: Class B

Power Requirements: (1/8 power, pink noise at 4Ω, 120 V) 6.3A

Frequency Response: 20 Hz - 20 kHz, +0, 1 dB

Dynamic Headroom (4Ω): 2 dB

Damping Factor: 100

Input Impedance (Ω): 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 30 (13.5 kg) / 25 lbs (11.5 kg) Agency Approvals: UL, CE, RoHS/WEEE compliant

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