The QSC GX3 Entertainer Power Amp provides an exceptional performance on a reasonable budget. With power levels that have been matched to the most popular speakers used by entertainers it can be widely used across many different stage set-ups. It is especially optimised for maximum real-world headroom into 4- and 8-ohm speaker systems. Designed for simplicity the GX3s minimum depth chassis (10.1) fits in compact racks making the GX3 easy and convenient to store and set up. Featuring dented gain controls precise settings and matching of sensitivity is simple and reliable. The GX3 even has front panel LEDs which monitor power signal and clipping that you can easily see when on stage mid-performance. This amplifiers GuardRail circuitry automatically protects your amplifier and loudspeaker from damage due to temperature spikes or overdrive without disrupting your performance.
GX Series 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 optimised output and appearance while reducing raw material cost and weight. Its all here – dramatic styling easy hook-up and adjustments excellent audio quality and QSC reliability. Power GX amplifiers deliver just the right amount of power to the most popular speakers used by entertainers. Typically loudspeaker manufacturers recommend an amplifier with power output equal to the speakers 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. Thermal Efficiency 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. The amplifier uses 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™ 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. Subwoofer/Satellite Crossover 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™ optimises peak power into the sub and top individually for greater musical impact and dynamic range. Features Power levels matched to the most popular speakers used by entertainers Optimised 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 – less than 26 lb (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 Output Power Per Channel 8 ohm / both channels driven / 1 kHz: 300 W 8 ohm / single channel driven / 1 kHz: 350 W 4 ohm / both channels driven / 1 kHz: 425 W 4 ohm / single channel driven / 1 kHz: 500 W Specifications Distortion (1dB 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 Vrms Voltage Gain (8 ohm): 32.2 dB Output Circuitry: Class B Frequency Response: 20 Hz – 20 kHz +0 1 dB Dynamic Headroom (4 ohm): 2 dB Input Impedance (ohms): 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 Net: 27 lb (12.1 kg) Shipping: 31 lb (14.1 kg) Agency Approvals: UL CE RoHS/WEEE Compliant .tg border-collapse:collapse;border-spacing:0; .tg td font-family:Arial sans-serif;font-size:14px;padding:3px 0px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal; .tg th font-family:Arial sans-serif;font-size:14px;font-weight:normal;padding:3px 0px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal; .tg .tg-glis font-size:10px .tg .tg-d3l3 font-weight:bold;font-size:10px;text-align:center .tg .tg-7dqz font-weight:bold;font-size:10px .tg .tg-gozu font-size:10px;text-align:center .tg .tg-4d2x font-style:italic;font-size:10px;text-align:center AC Current and Heating 120 VAC(multiply current by 0.5 for 230 VAC) GX3 Operating Condition AC amps BTU/hour Idle 0.2 44 8 + 8 ohms 1/8 power 1 4.1 904 8 + 8 ohms 1/3 power 2 6.1 1160 8 + 8 ohms full power 3 9.75 1109 4 + 4 ohms 1/8 power 1 6.3 1515 4 + 4 ohms 1/3 power 2 9.4 2105 4 + 4 ohms full power 3 15.0 2297 1 1/8 power represents typical maximum operating conditions 2 1/3 power represents overdriven program levels 3 Full power is breaker limited to short periods For 230 V multiply AC current by 0.5 For 100 V multiply AC current by 1.25
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