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Monoblock Class D Subwoofer Amplifier, 500 W x 1 @ 2 Ω / 300 W x 1 @ 4 Ω - 14.4V This rugged and reliable Class D monoblock uses a robust MOSFET power supply design that delivers rock-solid bass performance at a very affordable price. Targeted specifically for subwoofer applications, the JX500/1D includes a low-pass filter with continuously variable cutoff frequency selection from 50-200 Hz. It also features a variable bass boost at 45 Hz. with up to 12 dB of boost and an optional remote level control. Dedicated hi-level inputs are included, in addition to conventional low-level RCA inputs, making it easy to integrate with a variety of OEM and aftermarket head units. @ 4 Ω 300 W RMS x 1 @ 3 Ω 400 W RMS x 1 @ 2 Ω 500 W RMS x 1 @ 1.5 Ω N/A @ 4 Ω 235 W RMS x 1 @ 3 Ω 300 W RMS x 1 @ 2 Ω 410 W RMS x 1 @ 1.5 Ω N/A Frequency Response 10 Hz - 150 Hz (+0, -1dB) S/N Ratio, referred to highest rated power >90 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth) S/N Ratio, referred to 1 W >62 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth) Damping Factor @ 4 Ω >1000 / 50 Hz Damping Factor @ 2 Ω >500 / 50 Hz THD+N @ Rated Power <1% @ 2 Ω per Ch. Input Voltage Range @ RCA Inputs 200 mV - 4 V RMS Input Voltage Range @ High-Level Inputs 2 V - 10 V RMS Min.Copper Power / Ground Wire Gauge 4 AWG wire Fuse Rating 60 A (AFS, AGU or MaxiFuse™) Filter Mode(s) Low-Pass only Filter Slope(s) 12 dB/octave Filter Frequency Range 50 Hz - 200 Hz Detented, Calibrated Filter Freq. Potentiometer No Filter Defeat Function No Infrasonic Filter none Bass Boost EQ 0 to +12 dB @ 45 Hz Output Polarity Switch No Remote Subwoofer Level Control Optional (RBC-1) Remote Bass EQ Boost Control No Pass-Through Preamp Output Unbuffered Height (H) 2.09 in / 53 mm Width (W) 7.83 in / 199 mm Depth (D) 7.68 in / 195 mm Net Weight 4.8 lb / 2.18 kg Class D Circuitry Summary:Subwoofer-optimized, Class D amplifier circuit delivers high efficiency without sacrificing low-frequency fidelity. Detailed Information:The design of our Class D subwoofer amplifier circuits places a high emphasis on damping of the driven load and low-frequency control. Exceptional efficiency is also achieved, which allows the amplifier to be physically compact and also draws far less current from a vehicle’s electrical system during high-power operation. Download  JX500/1D Product Manual  USA Limited Warranty:  Two (2) years from the original date of purchase Warranty Details  Find the answers to many common questions: Â