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QSC GX3 Stereo Power Amplifier

Item # 104832845 | Customer Ratings: Ratings (Based on 10 reviews)

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QSC GX3 Stereo Power Amplifier
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      QSC GX3 Stereo Power Amplifier (104832845)
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Maximum performance at a modest price plus flexible I/O.

The QSC GX3 Stereo Power Amplifier is ideal for professional entertainers who require maximum performance and portability on a limited budget. QSC designers have optimized output and appearance of the GX3 power amp while reducing raw material cost and weight. The rackmount GX3 power amplifier is ideal for speakers in the 300W (Program) range and supplies maximum possible power to 4 ohm and 8 ohm loads.

The GX3 power amp uses the latest QSC Grounded Collector output system for optimum cooling of the critical power transistors. The GX3 power amp's true Class B biasing system combines maximum thermal efficiency with excellent audio performance.

QSC GX3 Stereo Power Amplifier Features:

  • Power levels matched to the most popular speakers used by entertainers
    Optimized for maximum real-world headroom into 4Ω and 8Ω 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 — less than 26 lbs (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


QSC GX3 Stereo Power Amplifier Specifications:

  • Power Rating:
    8Ω / both channels driven / 1 kHz: 300 W
    8Ω / single channel driven / 1 kHz: 350 W
    4Ω / both channels driven / 1 kHz; 425 W
    4Ω / single channel driven / 1 kHz; 500 W
    2Ω / both channels driven / 1 kHz; 200 W

    Distortion (typical): 20 Hz - 20 kHz: 1 dB below rated power 8Ω: less than 0.05% / 4Ω: less than 0.1%
    Signal to Noise: (20 Hz - 20 kHz) 100 dB
    Input Sensitivity: 1.2 Vrms
    Voltage Gain: (8Ω) 32.2 dB
    Output Circuitry: Class B
    Power Requirements: (1/8 power, pink noise at 4Ω, 120 V) 6.3A
    Frequency Response: 20 Hz - 20 kHz, +0, 1 dB
    Dynamic Headroom (4Ω): 2 dB
    Damping Factor: 100
    Input Impedance (Ω): 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: Shipping / Net 30 (13.5 kg) / 25 lbs (11.5 kg) Agency Approvals: UL, CE, RoHS/WEEE compliant


Product Reviews
Based on 10 reviews)
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  • Cheap, clean & clear!

    As reviewed by Chris Maione on 4/28/2010

    I went to get a Crown amp for my drum monitors and they were in the process of changing over models. I tried this amp and am really impressed. Nice, powerful, clean, clear and with a great price. Would buy this product again and recommend it to new buyers on a budget.

    19 of 19 people found this review helpful.
    Was this review helpful?
  • Outstanding

    As reviewed by ZigArt on 9/23/2010

    The Gx3 is a true value. Performance exceeds by a 1000% the cost range of this bass pounding with extreme clarity in all sonic ranges 2 rack space adrenalin fueled amp. Get It! I am getting more of them. Best amp find in years.

    16 of 16 people found this review helpful.
    Was this review helpful?
  • Very happy!

    As reviewed by Nick R. on 6/7/2010

    I bought this amp yesterday because my current Peavey PV 500 stopped working. I cannot believe how powerful and clear this amp sounds! Im running two MTX TP1200's for speakers and this Amp makes a great combo!

    4 of 4 people found this review helpful.
    Was this review helpful?
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