JD-Series Monoblock Amplifier, 500-Watt @ 2-Ohm or 250-Watt @ 4-Ohm
Designed to produce a whopping 500 watts into 2 ohms (14.4V, 1% THD), the JD500/1 amplifier is a great solution for powering subwoofers in a cost-conscious system. JL Audio's proprietary NexD™ switching technology delivers large amounts of real-world power output with excellent efficiency and ultra-low distortion.
The JD500/1’s controls are located on the input panel. while the power and speaker connections can be found along the opposite end of its extruded aluminum 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 line-level and speaker-level signals. 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 JD500/1 is also equipped with an onboard LED-clipping indicator ring, surrounding the input sensitivity control. This useful feature lets you set your amplifier’s input sensitivity, quickly and accurately, without special equipment. With the addition of an RBC-1 remote level control (sold separately), you can control the subwoofer level from the driver’s seat.
General Specifications
@ 4 Ω
250 W RMS x 1
@ 3 Ω
350 W RMS x 1
@ 2 Ω
500 W RMS x 1
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™)
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
JL Audio JD500/1 Manual
RD-Series 500-Watt Monoblock Subwoofer Amplifier @ 2-Ohms
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 JL's 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.
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™)
@ 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
JL Audio RD500/1 Manual
