Overview: RD Amplifiers

Sleek and powerful, RD amplifiers deliver outstanding amplifier performance and versatility at an unprecedented value.

Our latest RD amplifiers utilize JL Audio’s exclusive NexD™ switching technologies to generate loads of power with exceptional efficiency to reduce current draw and heat. Each model features a modern, industrial design with a high performance look and finish. For ease of installation and making adjustments, all connections are placed along one side of the amplifier with the controls on top, concealed beneath a removable protective cover. Two brand new features have been added to simplify installation and set-up: easy-to-use LED clipping indicators streamline the input level setting process and stereo output channels include input type switches, eliminating the need for Y-adaptors when bridging. Return to RD amplifiers.

RD500/1 Amplifier Overview Image RD1000/1 Amplifier Overview Image RD400/4 Amplifier Overview Image RD1000/1 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 Logo Differential 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.

Return to RD amplifiers.