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Item # 109705822

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QSC GX7a Stereo Power Amplifier
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      QSC GX7a Stereo Power Amplifier (109705822)
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Extraordinary weight to power ratio.

The most powerful of the GX family of QSC power amps, the QSC GX an ideal power amp 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 intrinsic to GX. Add contemporary styling, multiple input/output options, light weight, and advanced protection circuitry, and the GX Series represents real value.

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 GX3 is ideal for speakers in the 300 watt (Program) range, while the GX5 provides full performance for 500 watt (Program) speakers. The GX7 outputs 725 watts into an 8 ohm load. Owners of popular 4 ohm loudspeakers (such as dual-woofer, two-way models) will find the 700 watt (4 ohm) power of the GX5 an ideal match while the GX7's 1000 watts will very capably power many of today's popular subwoofers or two typical 8 ohm speakers per channel.

The GX7a 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.

The GX7 also features the road-proven PowerLight supply to the 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. As always, GX Series 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.

QSC GX7a Stereo Power Amplifier Features:

  • Power levels matched to the most popular speakers used by entertainers
    Optimized for maximum real-world headroom into 4 ohm 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-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 - 15.5 lb.
    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


QSC GX7a Stereo Power Amplifier Specifications:

  • 8 ohms / 1 kHz (both channels driven) 725 W
    8 ohms / 1 kHz (single channel driven) 800 W
    4 ohms / 1 kHz (both channels driven) 1000 W
    4 ohms / 1 kHz (single channel driven) 1200 W
    Distortion (1 dB 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 ohms): 36.1 dB
    Output Circuitry: 2-tier Calss H
    Power Requirements (1/8 power, pink noise at 4 ohms, 120V): 10.1A
    Frequency Response 20 Hz - 20 kHz: +0, -1 dB
    Dynamic Headroom (4 ohms): 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
    Height: 3.5" 2RU
    Width: 19"
    Depth: 10.1"
    Weight Net: 15.5 lb.
    Agency Approvals UL, CE, RoHS/WEEE Compliant


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