JL Audio RD500/1 Monoblock Class D Subwoofer Amplifier

  • Mono subwoofer amplifier
  • 250 watts RMS x 1 at 4 ohms (500 watts RMS x 1 at 2 ohms)
  • Class D amplifier design with NextD™ switching amp technology
  • Differential-balanced inputs help eliminate noise
  • Variable low-pass filter (50-500 Hz, 12 dB/octave)
  • Variable bass boost (0-12 dB at 45 Hz)
  • LED clip light helps set gain
  • $479.00


    Born to produce a whopping 500 watts into 2 ohms (14.4V, 1% THD), the RD500/1 amplifier was engineered to generate tons of pure subwoofer bliss from a sleek, ultra-compact chassis. The secret behind its power proficiency is our proprietary NexD™ switching technology, which delivers large amounts of power output with precise efficiency and ultra-low distortion.

    For your convenience, the RD500/1’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-balanced inputs are also on-hand, 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 RD500/1 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 RD500/1 features a durable, black powder-coated finish and a top-mounted, dual-color LED light strip that reports the overall status and condition. With the addition of an RBC-1 remote level control (sold separately), you can control the subwoofer output directly from the driver’s seat.

    Total Max Power (Car Amplifiers) 500 Watts
    # of Channels Mono/Monaural
    1 ohm Power Output Information Not Available
    2 ohm Power Output 500W x1 RMS
    4 ohm Power Output 250W x1 RMS
    Bass Boost (Car Amplifiers) Yes
    Bridgeable (Amplifiers) Information Not Available
    Bridged Power at 2 ohms (Amplifiers) Information Not Available
    Bridged Power at 4 ohms (Amplifiers) Information Not Available
    External Bass Control Capable (Car Amplifiers) Yes
    Fuse Rating 50A
    Input Voltage (Car Amplifiers) Switchable from 200 mV - 2 V RMS (Low) to 800 mV - 8 V RMS (High)
    Low Pass Filter (Car Amplifiers) 50 Hz - 500 Hz - 12 dB/octave
    High Pass Filter (Car Amplifiers) Information Not Available
    Frequency Response (Car Amplifiers) 7 Hz - 500 Hz (+0, -1dB)
    MOS-FET Switching (Car Amplifiers) Information Not Available
    Overload Protection (Car Amplifiers) Information Not Available
    Protection Indicator (Car Amplifiers) Yes
    RCA Inputs (# Of Pairs) (Car Amplifiers) Information Not Available
    RCA Outputs (# Of Pairs) (Car Amplifiers) Information Not Available
    Screw Type Terminals (Car Amplifiers) Information Not Available
    Signal-to-Noise Ratio Information Not Available
    Smart Engage Turn On (Car Amplifiers) Information Not Available
    Speaker Lvl Inputs (Car Amplifiers) Information Not Available
    Tri-Mode Capable (Car Amplifiers) Information Not Available
    Manufacturer's Parts Warranty 1 Year Limited
    Manufacturer's Labour Warranty 1 Year Limited