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The U.S. Acoustics Big Ben amplifier is an extremely powerful yet efficient amplifier intended for extremely demanding installations. The Big Ben is a high-quality mono amplifier that offers 3500 watts into a single channel at 1 ohm. This amplifier is ideally used to power subwoofer(s) in your car audio system.



  • 1 x 3500 Watts RMS @ 1 Ohm

  • Thermally Stable Heat Sink design
    for maximum heat transfer efficiency

  • Extra Large Gauge Terminals for show
    quality installations

  • Designed with the latest Technology in
    Ultra Efficient Class D design

  • DC, Short Circuit, Thermal and Overload Protection

  • Extreme Bulk capacitor banks for High Power Stability

  • Diagnostic LEDs

  • Butterworth Crossover Filters for serious
    high-end performance

  • Docking Pads® to reduce vibration and
    extend the life of your amplifier

U.S. Acoustics Big Ben 3.5kw

  • Output Power at 14.4V Input

    RMS per channel at 4Ω

    875 W x 1 CH

    RMS per channel at 2Ω

    1750 W x 1 CH

    RMS Bridged Mono at 4Ω


    RMS Mono at 1Ω

    3500 W x 1 CH

    Input Sensitivity

    200mV – 6.0V

    Frequency Response

    10Hz – 250Hz +/- 0.5dB


    < 0.5%

    S/N Ratio

    > 107 dB

    Channel Separation


    Damping Factor @ 100hZ 4Ω

    > 350

    High Pass, 12dB/Octave


    Low Pass, 24dB/Octave

    10Hz – 150Hz

    Subsonic Filter

    15 – 55Hz

    Variable Bass Boost

    (0 to +12dB boost @ 50Hz)


    Wired Remote


    Phase Shift




    External 400A


    24.6 x 8.4 x 2.2

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