  QSC GX3 Professional Power Amplifier
GX3 For 8 ohm speakers:
250 Watt - 350 Watt (program)
GX Series amplifiers are 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 while reducing raw material cost and weight. It's all here – dramatic styling, easy hookup and adjustments, excellent audio quality and QSC reliability.
GX amplifiers deliver just the right amount of power to the most popular speakers used by entertainers. Most loudspeaker manufacturers recommend an amplifier with power output equal to the speaker's "Program (Music) Power" rating or two times (2 x) the "Continuous (RMS) Power" rating.
The GX3 is ideal for speakers in the 300 watt (Program) range, while the GX5 provides full performance for 500 watt (Program) speakers. Both models supply maximum possible power to 4 ohm and 8 ohm loads.
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.
Premium toroidal power transformers for reliable "mid-weight" performance. A variable-speed fan moves air crosswise through the amplifier, drawing cool air in over the power transformer, through the fan, and then over the heat sink. This keeps the transformer cool and allows a full size heat sink to fit in a down-sized chassis. As always, the amplifiers are fully protected from the usual hazards of the trade, ensuring stable performance and long life.
GuardRail protection delivers full peak power while preventing detrimental overloads. During excessive clipping, or extreme overheating, GuardRail reduces gain just enough to preserve the integrity of the music, protect the speakers and keep the audience excited, without unprofessional distortion levels or shutdowns.
A subwoofer reduces strain on the full-range speaker, allowing it to play louder, or letting a smaller speaker do the same job. The GX Series supports this mode with a Crossover switch that splits the full-range input entering Ch 1, sending 20 Hz - 100 Hz to the sub (Ch 1) and 100 Hz - 20 kHz to the top box (Ch 2). The front panel gain controls balance the sub and top box, while GuardRail optimizes peak power into the sub and top individually, for greater musical impact and dynamic range.
Features:
Power levels matched to the most popular speakers
Optimized for maximum real-world headroom into 4 ohm and 8 ohm speaker systems
Inputs: XLR, 1/4" TRS and phono input connectors
Outputs: Speakon® combo accepts, 1/4" (TS) plugs
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
Front panel LEDs monitor Power, Signal and Clipping
Subwoofer/Satellite crossover built-in
Specifications:
8 ohms / 1 kHz (both channels driven): 300 W
8 ohms / 1 kHz (single channels driven) 350 W
4 ohms / 1 kHz (both channels driven) 425 W
4 ohms / 1 kHz (single channels driven) 500 W
Signal to Noise (20 Hz - 20 kHz): 100 dB
Input Sensitivity: 1.2 Vrms
Frequency Response: 20 Hz - 20 kHz, +0, 1 dB
Maximum Input Level: +24 dB (16 Vrms)
Output Connectors (each channel): Speakon®, 1/4", Binding Posts
Amplifier and Load Protection: Short circuit, open circuit, thermal, RF protection
Load
Dimensions: 3.5" H x 19" W x 10" D
Weight: 25 lbs.
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