JL Audio RD500/1, 500W 1ch Class D amplifier
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.
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™) |
Height (H) | 2.13 in / 54 mm |
Width (W) | 9.78 in / 248 mm |
Depth (D) | 6.96 in / 177 mm |
Data sheet
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