QSC GX3Item ID: GX3
2 x 350W at 4 Ohms, 2 x 300W at 8 Ohms, Amp and Load Protection and Crossover Switch
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From Our Research Team:
A Lightweight Power Amp That Really Packs a Punch!The QSC GX3 425-watt power amplifier gives your speakers the power they need while giving you the efficiency and protective features you want for easy operation and peace of mind. The GX3 uses advanced components for both light weight and reliability. Its Guardrail protection allows delivery of peak power while preventing overloads. It's equipped with a crossover switch, so adding a subwoofer to your system is a snap. Optimized for 4- and 8-ohm speakers, this amp also fits perfectly into popular racks, and its lightweight design (less than 30 lbs.) makes the GX3 incredibly easy to transport.
QSC GX3 425-watt Power Amplifier at a Glance:
The right amount of power for your application
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 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. 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 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 GX5 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.
Both amplifiers use 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 from overloads
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-ready when you are
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.
QSC GX3 425-watt Power Amplifier Features:
The QSC GX3 gives you the right wattage for your system!
Can We Help?Sweetwater's friendly and knowledgeable Sales Engineers are regarded as the most experienced and educated professionals in the music industry, with extensive music backgrounds and intense training on the latest products and technologies. As your personal contact here at Sweetwater, they are available to provide personalized advice any time you need it.
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Johlene, Richmond, KY
Reviewsbased on 6 reviews
One Great Amp
by Brian Wombaugh from Walnut Cove, NCI purchased two of thes units for our Church. I originally was going to run one for the main speakers and the other for the monitor speakers. I decided initially to just try and use one amp to driv... read more [+]e both the mains and the monitors by daisy chaining. I was skeptical that the one amp would be over driven and not be able to power both. Boy was I wrong ! The one amp provided way more power than I needed for the mid size sanctuary. The sound was powerful and crystal clear. The QSC amps seem to be very well made and come with a reputation second to none. It's all backed up with a 6 year warranty. I don't think there is any amp out there that offers as much bang for the buck ! close [-]
August 27, 2012
Music Background: Live Sound Engineer
QXC GX3 Amp
by Adrian Van Manen from Oklahoma CityGreat Product! Unbeatable warranty!
September 6, 2011
Music Background: Church Music Director
Best amp in it's price range
by from Tampa, FloridaIve been working with amps from several "high end" companies. QSC really blew me away with this GX3 for $300. For the price, size, and weight, this is the best low cost amp I have ever worked with. I... read more [+] have 3 of them, on Sundays they are used to drive monitors at my church for the praise band, and during the rest of the week they are used for Theatre Productions to drive monitors along with the big brother GX5 and the PLX02 Series. close [-]
April 15, 2010
Music Background: Hobbyist
Sweet amp from Sweetwater, QSC GX3
by Jim Brown from United StatesNice, connected 3 Peaveys small wedge monitors on one channel, 3 on the other. We all noticed the clarity of sound, and had to turn the main amp sliders back a bit on sound board. And no heat, on prim... read more [+]ary monitors or amp. Nice. close [-]
November 16, 2012
Music Background: Play guitar, electric bass acoustic, flute, manage the sound, since 1978.
Good amp for the price!
by R. Floyd from Memphis, TNIt replaced an Alesis Matica amp for the main monitors in my studio and has more power than I needed, but it had the features I wanted. The only minor problem I have is the slightly higher noise level... read more [+] compared to the amp it replaced. Also, if you want a operating manual, you will have to call the manufacture to get it. Other than that, it seems to be a great little amp. Time will tell. close [-]
October 31, 2012
Music Background: Recording, guitar and bass player.
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