• 500 Watts RMS x1 @ 4 Ohm
• 750 Watts RMS x1 @ 2 Ohm
• Built-in Selectable/Adjustable Crossovers

JL Audio JD500/1 Subwoofer Amplifier

Powerful and Efficient Performance
Producing a remarkable 500 watts into 2 ohms (14.4V, 1% THD), the JD500/1 amplifier is a perfect choice for powering subwoofers in a budget-friendly audio system. Utilizing JL Audio’s proprietary NexD™ switching technology, this amplifier delivers significant real-world power with outstanding efficiency and ultra-low distortion, ensuring your system produces clean, powerful bass.

Intuitive Design and Versatile Features
The JD500/1 is thoughtfully designed for convenience and functionality. Its controls are housed on the input panel, while power and speaker connections are positioned on the opposite side of its robust extruded aluminum chassis. Key signal processing features include a 12 dB/octave low-pass filter with a fully adjustable frequency range from 50 to 500 Hz and a variable bass boost EQ for precise tuning.

Dual-range, differential-balanced inputs make the amplifier compatible with both line-level and speaker-level signals, offering versatility for various system setups. Automatic turn-on capability—via signal sensing or DC-offset sensing—simplifies installation, while preamp outputs make it easy to daisy-chain signals to additional amplifiers.

Precision Made Easy
The JD500/1 is equipped with an onboard LED-clipping indicator ring around the input sensitivity control, enabling quick and accurate input sensitivity adjustments without the need for specialized tools. For added convenience, the optional RBC-1 remote level control (sold separately) allows you to adjust the subwoofer level effortlessly from the driver’s seat.

Combining power, efficiency, and user-friendly features, the JD500/1 delivers outstanding performance and value for any audio enthusiast seeking high-quality bass on a budget.

Specifications

Rated Continuous (RMS) Power @ 14.4 V
@ 4 Ω: 250 W RMS x 1
@ 3 Ω: 350 W RMS x 1
@ 2 Ω: 500 W RMS x 1

Rated Continuous (RMS) Power @ 12.5 V
@ 4 Ω: 225 W RMS x 1
@ 3 Ω: 300 W RMS x 1
@ 2 Ω: 400 W RMS x 1

General Specifications
Frequency Response: 7 Hz - 500 Hz (+0, -1dB)
S/N Ratio, referred to highest rated power:>80 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)
S/N Ratio, referred to 1 W:>60 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: Switchable from 200 mV - 2 V RMS (Low) to 800 mV - 8 V RMS (High)
Min.Copper Power / Ground Wire Gauge: 4 AWG wire
Fuse Rating: 50 A (AFS, AGU or MaxiFuse™)

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

Physical Specifications
Height (H): 2.10 in / 53 mm
Width (W): 9.50 in / 242 mm
Depth (D): 7.50 in / 190 mm