The QSC GX7 power amplifier delivers amazing power and performance at a great price.
GX Series amplifiers are ideal for professional entertainers who require maximum performance and portability on a limited budget. The hallmarks of the QSC brand - professional audio quality, meticulous engineering, precision manufacturing and long-term reliability - are all present in the GX7. Add contemporary styling, multiple input/output options, light weight, and advanced protection circuitry, and the GX7 clearly represents real value - something everyone can use.
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 speaker's Program (Music) Power rating or two times (2 x) the Continuous (RMS) Power rating.
The GX7 outputs 725 watts into an 8 ohm load. The GX7's 1000 watts into a 4 ohm load will very capably power many of today's popular subwoofers or two typical 8 ohm speakers per channel.
The GX7 adds QSC's road-proven PowerLight power supply to a Class H output section, for more overall output power and additional weight savings. The result is one of the highest power-to-weight ratios in the industry. A low-noise variable-speed fan with rear-to-front airflow keeps amplifiers and racks cool.
The GX7 features QSC's GuardRail protection which 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 GX7 allows for the use of a subwoofer/satellite speaker combination with a single amplifier. The crossover switch 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. GuardRail optimizes peak power into the sub and top individually, for greater musical impact and dynamic range.
For stereo operation you would of course need two GX amplifiers, but this configuration has some distinct advantages over using one amp for tops and one for subs. Input connections are simplified as you only need to send one cable to each amp from your board. And by driving only one sub per amplifier, when a heavy low frequency section hits, the amplifier's power supply can use the excess headroom from the relatively lighter loaded full range channel.
On the input side, the GX Series amplifiers feature balanced XLR and 1/4" TRS in addition to RCA phono connectors to cover just about any professional or consumer audio source. On the output side, Speakon® combo connectors accept 1/4" TS plugs or Speakon 2-pole and 4-pole (however only 2 poles are used) plugs. There are also binding posts to cover all other speaker wiring configurations.