JL Audio RD Amplifiers

The JL Audio RD Series amplifiers use JL Audio's NexD swtiching technology to efficiently generate tons of power without excessive current draw or heat generation. The JL Audio RD amps feature a sleek, black chassis with a cover for all of the controls. The inputs and connections are all along the side of the amplifier for easy installation and connections. The RD amps feature studio grade signal processing like the XDv2 amps and have automatic turn-on capability, reducing the need for the remote wire. These amps have differential-balanced inputs to limit noise and allow for both high and low level inputs. All JL Audio RD amplifiers feature stereo, pre-amp outputs and they have built-in LED clipping indicators which allow you to quickly and easily set your gains at the perfect level.
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RD500/1 Amplifier Overview ImageRD1000/1 Amplifier Overview ImageRD400/4 Amplifier Overview ImageRD1000/1 Amplifier Overview Image

Model

RD500/1
(Monoblock Class D Subwoofer Amplifier)

RD1000/1
(Monoblock Class D Subwoofer Amplifier)

RD400/4
(4-Channel Class D
Full-Range Amplifier)

RD900/5
(5-Channel Class D 
System Amplifier)

Continuous RMS Power 
@ 14.4 V

250 W x 1 @ 4 Ω
350 W x 1 @ 3 Ω
500 W x 1 @ 2 Ω

600 W RMS x 1 @ 4 Ω
800 W RMS x 1 @ 3 Ω
1000 W RMS x 1 @ 2 Ω

75 W x 4 @ 4 Ω
100 W x 4 @ 2 Ω
200 W x 2 Bridged @ 4 Ω

Ch 1-4 (front & rear)
70 W x 4 @ 4 Ω
100 W x 4 @ 2 Ω
200 W x 2 Bridged @ 4 Ω
Ch 5 (sub)
225 W x 1 @ 4 Ω
325 W x 1 @ 3 Ω
500 W x 1 @ 2 Ω

Continuous RMS Power 
@ 12.5 V

225 W x 1 @ 4 Ω
300 W x 1 @ 3 Ω
400 W x 1 @ 2 Ω

500 W RMS x 1 @ 4 Ω
650 W RMS x 1 @ 3 Ω
800 W RMS x 1 @ 2 Ω

60 W x 4 @ 4 Ω
90 W x 4 @ 2 Ω
180 W x 2 Bridged @ 4 Ω

Ch 1-4 (front & rear)
60 W x 4 @ 4 Ω
90 W x 4 @ 2 Ω
180 W x 2 Bridged @ 4 Ω
Ch 5 (sub)
200 W x 1 @ 4 Ω
250 W x 1 @ 3 Ω
350 W x 1 @ 2 Ω

Frequency Response 
(+0,-1dB)

7 Hz - 500 Hz

7 Hz - 500 Hz

12 Hz - 22 kHz

Main 12 Hz - 22 kHz,
Sub 10 Hz - 500 Hz

S/N Ratio (re rated power)

>80 dBA (20 kHz bandwidth)

>80 dBA (20 kHz bandwidth)

>104 dBA (20 kHz bandwidth)

>104 dBA (20 kHz bandwidth)

Damping Factor

>1000 / 50 Hz @ 4 Ω,
>500 / 50 Hz @ 2 Ω

>1000 / 50 Hz @ 4 Ω,
>500 / 50 Hz @ 2 Ω

>150 / 50 Hz @ 4 Ω,
>75 / 50 Hz @ 2 Ω

>150 / 50 Hz @ 4 Ω,
>75 / 50 Hz @ 2 Ω

THD+N @ Rated Power

<1% @ 2 Ω

<1% @ 2 Ω

<1% @ 2 Ω

<1% @ 2 Ω

Crossover Filter Modes, Slope, Frequency Range

Low-Pass, 12 dB, 
50 - 500 Hz

Low-Pass, 12 dB, 
50 - 500 Hz

Low-Pass/High-Pass, 12 dB, 
50 - 500 Hz

Main - High-Pass 12dB, 
50 - 500 Hz; 
Sub - Low-Pass, 12 dB, 
50 - 500 Hz

Infrasonic Filter,
Sub Polarity

N/A

N/A

N/A

N/A

Input Voltage Range

200 mV - 2 V RMS 
(Low-Level),
800 mV - 8 V RMS 
(High-Level)

200 mV - 2 V RMS 
(Low-Level),
800 mV - 8 V RMS 
(High-Level)

200 mV - 2 V RMS 
(Low-Level),
800 mV - 8 V RMS 
(High-Level)

200 mV - 2 V RMS 
(Low-Level),
800 mV - 8 V RMS 
(High-Level)

Input Mode Switch

N/A

N/A

2 / 4 channel

2 / 4 / 6 channel

Input Type Switch

N/A

N/A

Stereo / Mono (Ch 1 & 2)
Stereo / Mono (Ch 3 & 4)

Stereo / Mono (Ch 1 & 2)
Stereo / Mono (Ch 3 & 4)

Pass-Through Preamp Output

Yes, buffered

Yes, buffered

Yes, buffered

N/A

Output Clipping LED

Yes

Yes

Yes, 
Ch 1 & 2 / Ch 3 & 4

Yes, 
Ch 1 & 2 / Ch 3 & 4 / Sub Ch

Remote Controller Option: Model, Control Mode

RBC-1,
level

RBC-1,
level

N/A

RBC-1,
sub ch. level

PWR-GND Wire / 
Fuse Rating

4 AWG / 50 A

4 AWG / 80 A

4 AWG / 40 A

4 AWG / 80 A

Dimensions

2.13 in x 9.78 in x 6.96 in / 
54 mm x 248 mm x 177 mm

2.13 in x 14.66 in x 6.96 in / 
54 mm x 372 mm x 177 mm

2.13 in x 9.78 in x 6.96 in / 
54 mm x 248 mm x 177 mm

2.13 in x 14.66 in x 6.96 in / 
54 mm x 372 mm x 177 mm

RD Amplifiers include the following JL Audio technologies and features:

NexD LogoDifferential Balanced Inputs

NexD™ Switching Technology

Differential-Balanced Inputs

NexD™ amplifier technologies produce exceptional audio quality, unsurpassed total efficiency and high power from very compact amplifier designs.

JL Audio’s Differential-Balanced Inputs are engineered to combat induced cable noise, which is a common problem in car and marine audio installations. This technology allows for the use of conventional RCA cables, while delivering many of the benefits of a true balanced connection and accepting a wide range of input signal levels.


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