Monoblock Class D Subwoofer Amplifier, 1500 W x 1 @ 1 - 2 Ω / 750 W x 1 @ 4 Ω - 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).
@ 4 Ω |
750 W RMS x 1* |
@ 3 Ω |
1000 W RMS x 1* |
@ 2 Ω |
1500 W RMS x 1* |
@ 1 Ω |
1500 W RMS x 1** |
*Requires “Low Z” switch to be in “2Ω” position **Requires “Low Z” switch to be in “1Ω” position
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Rated Continuous (RMS) Power @ 12.5 V
@ 4 Ω |
750 W RMS x 1* |
@ 3 Ω |
1000 W RMS x 1* |
@ 2 Ω |
1200 W RMS x 1* |
@ 1 Ω |
1500 W RMS x 1** |
*Requires “Low Z” switch to be in “2Ω” position **Requires “Low Z” switch to be in “1Ω” position
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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 Ω |
>1100 / 50 Hz |
Damping Factor @ 2 Ω |
>550 / 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 |
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 |
Physical Specifications
Height (H) |
2.13 in / 54 mm |
Width (W) |
18.05 in / 458 mm |
Depth (D) |
6.96 in / 177 mm |
Net Weight |
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