JL Audio RD500/1 Monoblock Class D Subwoofer Amplifier, 500 W

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.

@ 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™)

 

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)	9.78 in / 248 mm
Depth (D)	6.96 in / 177 mm

 

RD500/1 Product Manual