JL Audio Monoblock Class D Subwoofer Amplifier, 500 W RD500/1
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Monoblock Class D Subwoofer Amplifier, 500 W x 1 @ 2 Ω / 250 W x 1 @ 4 Ω - 14.4V
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 |
| @ 1.5 Ω | N/A |
| 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 |
| @ 1.5 Ω | N/A |
| 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™) |
| shipping Info | |
| 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) | 2.13 in / 54 mm |
| Width (W) | 9.78 in / 248 mm |
| Depth (D) | 6.96 in / 177 mm |