JL Audio RD400/4 400W RMS RD-Series NexD™ Class-D 4-Channel Car Amplifier

Power your music

JL Audio's RD400/4 4-channel amplifier will power each of your car's front and rear speakers with 75 watts RMS, so you'll hear and feel your music clearly over the whistle of the wind and rumble of the road. For driving bass, you can switch the RD400/4 to 2-channel mode and run a couple of subwoofers with up to 200 watts RMS each.

Low current demand, low distortion, and integration well

The RD400/4 plays your music with true fidelity and impressive impact, without straining your car's electrical system, thanks to JL Audio's proprietary NexD™ amplifier technology. "Differential-balanced" inputs keep the incoming signals clear of outside noise and allow you to connect this amp to just about any radio. The speaker-level inputs feature two auto turn-on modes so you can readily incorporate this amp into a factory system — no need for RCA connections or a remote turn-on lead for this setup. 

LED clip lights and other cool features

High- and low-pass filters help you dial in the perfect tone for your speakers or subs. Onboard LED clip indicators let you set the amp gain quickly and accurately with the use of a test tone. A removable cover hides the amp's controls, resulting in a handsome appearance and a tamper-resistant installation. Cool blue LED accent lighting adds some charm to this amp's rugged good looks.

JL Audio RD400/4 controls and accent lighting

Product Features:

• JL Audio RD-Series RD400/4
• Class-D 4-Channel Amplifier
• RMS Power Rating:
  • 4 ohms: 75 watts x 4 chan.
  • 2 ohms: 100 watts x 4 chan.
• Total power output: 800 watts
• CEA-2006 Compliant Amplifier
• NexD™ Technology delivers outstanding sound quality, efficiency and reliability
• LED clipping indicators
• Pulse Width Modulated MOSFET power supply
• LED power (green) and protect (red) indicators
• Soft start turn-on
• Mono channel operation
• Bridging switch for each channel pair
• Preamp RCA outputs to daisy chain multiple amps
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Dual speaker terminals simplify the hookup of multiple speakers
• Heavy-duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 12 - 22,000Hz
• Total Harmonic Distortion (THD): <1%
• Variable low-pass filter: 50 - 500 Hz, 12 dB/octave
• Variable high-pass filter: 50 - 500 Hz, 12 dB/octave
• Low-Pass Slope (dB/octave): 12 dB/octave
• Variable Bass Boost: 0 to +12 dB bass boost at 45 Hz
• Fuse Rating: 40 A x 1
• 4-8 gauge power and ground wiring is recommended for installation
• Dimensions: 7"W x 9-3/16"L x 2-1/8"H
• Manufacturer's Warranty

What's in the box: