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JL Audio Monoblock Class D Subwoofer Amplifier - 98643

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Abt Model: RD15001 UPC: 699440986434
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JL Audio 98643 Monoblock Class D Subwoofer Amplifier

Monoblock Class D Subwoofer Amplifier, 1500 W x 1 @ 1 - 2 Ù / 750 W x 1 @ 4 ohms - 14.4V

Engineered for high-power, subwoofer applications, the RD1500/1 monoblock amplifier is built to deliver staggering amounts of world-class bass output. Equipped with a special low impedance circuit, the RD1500/1 is capable of generating a whopping 1500 watts of output power, at either 1 or 2 ohms (14.4V, 1% THD). At the heart of this ultra-sleek and compact power plant is JL Audio’s exclusive NexD™ Class D technology, permitting high power output with exceptional efficiency and low distortion.

For your convenience, all of the RD1500/1’s controls are located on top of the amplifier, beneath a protective cover, with all connections found along one side of its chassis. Signal processing features include a 12 dB / octave low-pass filter, with continuously variable frequency selection from 50-500 Hz, and a variable bass boost EQ. Dual-range, differential-balance inputs are also onboard, capable of accepting most input voltage levels. Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard, along with a set of preamp outputs so you can easily pass signals to another amplifier.

The RD1500/1 is also equipped with an onboard LED-clipping indicator. This all-new, innovative feature lets you easily set your amplifier’s input sensitivity setting, quickly and accurately, with no special equipment needed. The RD1500/1 features a durable, black powder-coated finish and a top-mounted, dual-color LED light strip that reports the overall status and condition. Control of the subwoofer level from the driver’s seat is easily accomplished with the addition of the optional RBC-1 remote level control (sold separately).


Rated Continuous (RMS) Power @ 14.4 V

  • @ 4 ohms: 750 W RMS x 1*
  • @ 3 ohms: 1000 W RMS x 1*
  • @ 2 ohms: 1500 W RMS x 1*
  • @ 1 ohms: 1500 W RMS x 1**

Rated Continuous (RMS) Power @ 12.5 V

  • @ 4 ohms: 750 W RMS x 1*
  • @ 3 ohms: 1000 W RMS x 1*
  • @ 2 ohms: 1200 W RMS x 1*
  • @ 1 ohms: 1500 W RMS x 1**

General Specifications

  • Frequency Response: 7 Hz - 500 Hz (+0, -1dB)
  • S/N Ratio, referred to highest rated power: >82 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)
  • S/N Ratio, referred to 1 W: >50 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
  • Damping Factor @ 4 ohms: >1100 / 50 Hz
  • Damping Factor @ 2 ohms: >550 / 50 Hz
  • THD+N @ Rated Power: <1% @ 2 ohms per Ch.
  • Input Voltage Range @ RCA Inputs: Switchable from 200 mV - 2 V RMS (Low) to 800 mV - 8 V RMS (High)
  • Min.Copper Power / Ground Wire Gauge: 2 AWG wire
  • Fuse Rating: 150A (AFS or AGU)

Signal Processing

  • Filter Mode(s): Low-Pass only
  • Filter Slope(s): 12 dB/octave
  • Filter Frequency Range: 50 Hz - 500 Hz
  • Detented, Calibrated Filter Freq. Potentiometer: No
  • Filter Defeat Function: No
  • Infrasonic Filter: No
  • Bass Boost EQ: Yes
  • Output Polarity Switch: No
  • Remote Subwoofer Level Control: Optional (RBC-1)
  • Remote Bass EQ Boost Control: No
  • Pass-Through Preamp Output: Buffered


  • *Requires “Low Z” switch to be in “2 Ù” position
  • **Requires “Low Z” switch to be in “1 Ù” position
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