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Item # 481805 | Customer Ratings: Ratings ( 5 Based on 17 reviews)

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QSC GX5 Stereo Power Amplifier
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      QSC GX5 Stereo Power Amplifier (481805)
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Maximum performance and portability with very flexible I/O.

The QSC GX5 Stereo Power Amplifier is ideal for professional entertainers who require maximum performance and portability on a limited budget. QSC designers, headed by Pat Quilter, have optimized output and appearance of the rackmountable GX5 while reducing raw material cost and weight. The GX5 power amplifier provides full performance for 500 watt (Program) speakers and supplies 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 GX5 power amp 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.

QSC GX5 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 GX5 Stereo Power Amplifier Specifications:

  • Power rating:
    8Ω / both channels driven / 1 kHz: 500 W
    8Ω / single channel driven / 1 kHz; 600 W
    4Ω / both channels driven / 1 kHz; 700 W
    4Ω / single channel driven / 1 kHz; 850 W
    2Ω / both channels driven / 1 kHz: 350 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): 34.4 dB
    Output Circuitry: 2-tier Class H
    Power Requirements (1/8 power, pink noise at 4Ω, 120 V):6A
    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: 31 (14 kg) / 26 lbs (12 kg)
    Agency Approvals: UL, CE, RoHS/WEEE compliant


Product Reviews
(Based on 17 reviews)
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Viewing Reviews 1 - 3 of 17 |
  • Great power amp!!

    As reviewed by J.P. Singer on 8/13/2008

    My QSC GX5 Powers 2-18in.subs and 2-15in.full range cabs,and does it with ease!!Never runs hot,never no problems!If your on a budget,You won't find a better power amp for the price!!Great power amp!!!!

    39 of 39 people found this review helpful.
    Was this review helpful?
  • Solid Power in Varying Conditions.

    As reviewed by DJ Dru on 9/1/2008

    Let me start by saying my GX5 has seen about everything you can imagine in its short 6 week out of the box life. I live in Georgia and the heat and the humidity here are often pushing the heat index to well over 100 degrees. I have done 3 outdoor gigs with this amp pushing a pair of JBL JRX 115's and one JRX 118s and it pushes them beautifully. The built in Crossover is really nice because splitting it out at 100 hz really has helped me push my mids/highs harder to provide enough sound for the outdoor gigs. My GX5 has even been run from a 35 dollar power inverter from a retail giant who shall remain nameless and provided music for a beach party i had the privilage of DJing. This is an all around great amp with very versitile inputs and outputs that make it possible for anyone not playing at 2 ohms or bridging channels to have a great sound at a not so discouraging price. QSC has been great for me thus far and i am just about convinced that there no other power amp company that is worth my time. Thanks QSC

    31 of 31 people found this review helpful.
    Was this review helpful?
  • Just Great. :)

    As reviewed by Joe Jr. on 7/28/2008

    At this price, no amp can deliver 500w at 8ohms. Amazingly, QSC also knows how to build quality amps at budget prices! Perfect for running small mains or monitors. Couldn't be happier with the purchase.

    22 of 22 people found this review helpful.
    Was this review helpful?
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