JL Audio RD900/5+ - 5 Channel Class D Amplifier

The look is amazing, and the performance backs it up. Designed as a total “one-box solution,” this RD series amplifier from JL Audio can comfortably drive a complete 4-satellite speaker system plus a subwoofer — all with a robust 900 watts of power.

Small size, minimal heat and lots of power — Class-D amplifier design offers significant advantages. And our NexD™ switching technology adds even more, using enhanced pulse width modulation techniques to boost the amplifier’s bandwidth while minimizing distortion and improving efficiency.

Churning out 900 watts of total power — 100 watts from each of its 4 channels into a 2-ohm load (14.4 volts, 1% THD) plus a robust 500 watts for a subwoofer — this RD series amp brings stunning output to your audio system. Each pair of main channels is also fully bridgeable, enabling an ultrapowerful 3-channel amplifier setup.

Each of the amplifier’s main channels is equipped with a 12-decibel/octave high-pass filter, with an additional band-pass filter on its rear channels and a dedicated low-pass filter for the subwoofer channel. All 3 crossovers offer continuously variable frequency selection from 50–500 Hz for precise filtering.

An LED clipping indicator light on the control panel lets you quickly set your amplifier’s input sensitivity, without the need for additional test equipment.

With “input type” switches on the stereo channel sections, RD series amps can eliminate the need for Y-adapters when bridging stereo output channels.

When used as a system amplifier, the band-pass crossover feature enables a two-way active configuration.

Key Features

EFFICIENT CLASS-D DESIGN

Small size, minimal heat and lots of power — Class-D amplifier design offers significant advantages. And our NexD™ switching technology adds even more, using enhanced pulse width modulation techniques to boost the amplifier’s bandwidth while minimising distortion and improving efficiency.

CLEAN, POWERFUL, RELIABLE

The 4-channel amp churns out 400 watts of total power — 100 watts from each channel into a 2-ohm load (14.4 volts, 1% THD). The 6-channel amp outputs 800 watts of total power with an additional pair of channels capable of 200 watts each into a 2-ohm load (14.4 volts, 1% THD). All RD channel pairs are bridgeable for maximum application flexibility.

STUDIO-GRADE SIGNAL PROCESSING

This RD series amplifier’s signal processing features include high- or low-pass 12-decibel/octave filters for each channel pair, with continuously variable frequency selection from 50–500 Hz. The 6-channel model offers triple high-pass filters or full 3-way crossover capability.

LED CLIPPING INDICATORS

LED clipping indicators on the control panel let you quickly set each channel pair’s input sensitivity, without the need for additional test equipment.

EASY CONNECTIVITY

With “input type” switches on the stereo channel sections, RD series amps can eliminate the need for Y-adapters when bridging stereo output channels.

BAND-PASS CROSSOVER

When used as a system amplifier, the band-pass crossover feature enables a two-way active configuration.

Technical Specifications

• Operating voltage: 10-16 VDC negative ground
• Operating temperature: from -20°C to 65°C
• Amplifier class: Class D
• Frequency response: Main channels: 12 Hz - 22 kHz (+0, -1 dB); Subwoofer channel: 10 Hz - 500 Hz (+0, -1 dB)
• Rated power output @ 14.4 VDC input < 1% THD+N: Main channels @ 4 Ω: 70 W RMS x4; Subwoofer channel @ 4 Ω: 225 W RMS x1; Main channels @ 2 Ω: 100 W RMS x4; Subwoofer channel @ 2 Ω: 500 W RMS x1; Main channels @ 4 Ω bridged: 200 W RMS x2
• Input sensitivity: 200 mV - 8 V RMS, adjustable
• Input type: Differential-balanced
• Signal to noise ratio (A-weighted, 20 Hz - 20 kHz noise bandwidth): Main channels: > 104 dB (referred to rated power), > 84 dB (referred to 1 W); Subwoofer channel: > 103 dB (referred to rated power), > 83 dB (referred to 1 W)
• Damping factor: Main channels: > 150 @ 4 Ω / 50 Hz, > 75 @ 2 Ω / 50 Hz; Subwoofer channel: > 120 @ 4 Ω / 50 Hz, > 60 @ 2 Ω / 50 Hz
• Filter type: Channels 1 and 2: Active, 12 dB/octave, high-pass; Channels 3 and 4: Active, 12 dB/octave, high-pass or bandpass; Subwoofer channel: Active, 12 dB/octave, low-pass
• Filter frequency: Channels 1 and 2: 50 Hz - 5 kHz, adjustable; Channels 3 and 4: 50 Hz - 500 Hz, adjustable; Subwoofer channel: 50 Hz - 500 Hz, adjustable
• Recommended fuse: 80 A
• Protection circuits: Input under/over voltage, Over temperature, Output short circuit
• In the box: RD 5-channel system amplifier, Hex wrench, Documentation
  

Further Information

JL Audio RD900/5+ - User Manual (PDF)