JL Audio JX400/4D 4-channel Class D Full-Range 400 watt car amplifier

Power your music

JL Audio's JX400/4D 4-channel amplifier delivers 70 watts RMS to each of your car's front and rear speakers so you'll hear and feel your music clearly over the noises of the wind and road. You can also switch over to 2-channel mode, and power a pair of subwoofers with 200 watts RMS each, and fill your ride with bass.

Convenient features

Variable high- and low-pass filters allow you to tune the amplifier to match your particular speaker or subwoofer system. The amp includes speaker-level inputs, along with preamp inputs and outputs, so it's ready to work in virtually any system.

Rugged construction

JL Audio designed this hefty little amplifier with sturdy, high-grade parts that ensure excellent heat management, provide high current flow, and deliver stable performance in almost any situation. Inside, you'll find oversized output transistors and a rugged MOSFET power supply; outside, the sleek, high-mass aluminum heatsink keeps things cool enough to virtually eliminate thermal shut-downs.

JX400/4D input and control panel

Product Features:

• JX Series 4-Channel Class D Subwoofer Amplifier
• RMS Power Rating (14.4V):
• 4 ohms: 70 watts x 4 chan.
• 2 ohms: 100 watts x 4 chan.
• Bridged, 4 ohms: 200 watts x 2 chan.
• RMS Power Rating (12.5V):
• 4 ohms: 50 watts x 4 chan.
• 2 ohms: 80 watts x 4 chan.
• Bridged, 4 ohms: 160 watts x 2 chan.
• Unregulated PWM switching type power supply
• LED power (green) and protect (red) indicators
• Soft start turn-on prevent clicking and popping when the system turns on
• Speaker-level (high-level) inputs with the included harness
• Preamp RCA outputs to daisy chain multiple amps
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Heavy-duty aluminum alloy heatsink for effective heat dissipation
• Nickel-plated RCA level inputs
• Nickel-plated screw terminals
• Selectable input mode: 2 Ch. / 4 Ch.
• Input sensitivity:
• Low level input: 200mV - 4V
• High level input: 2.0mV - 10.0V
• Selectable filter mode: HP / Off / LP
• Variable cutoff filter: 50 - 200 Hz, 12 dB/octave
• Frequency Response: 20 - 20,000 Hz
• Total Harmonic Distortion (THD): <1%
• Signal to Noise Ratio: >93 dB
• Damping Factor @ 4 ohms: >60 @ 4 ohms
• Fuse Rating: 40A x 1 inline (not supplied)
• 4 gauge power and ground wiring is recommended for installation. 
• Weight: 4.80 lb
• Dimensions: 7.68"W x 9.05"L x 2.09"H
• UK Internet Dealer
• 1 Year Manufacturer's Warranty

What's in the box: