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Mobile Electronics› Vehicle Audio and Components

JL Audio

4-Channel Class D Full-Range Amplifier

Name: 4-Channel Class D Full-Range Amplifier
Brand: JL Audio
SKU: JX400/4D

$299.99 $213.39 Save $86.60

SKU: JX400/4D

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Overview

The JL Audio JX400/4D is a four-channel, full-range amplifier utilizing Class D technology for efficient power delivery. This compact unit provides 70 watts RMS per channel at 4 ohms or 100 watts RMS per channel at 2 ohms, with a maximum output of 400 watts. It includes integrated high-pass and low-pass filters for precise frequency control in multi-channel audio setups.

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The JL Audio JX400/4D is a four-channel, full-range car amplifier designed for high-efficiency operation using Class D technology. This amplifier features a robust MOSFET power supply and delivers 70 watts RMS per channel at 4 ohms, or 100 watts RMS per channel at 2 ohms, for a total output capacity of 400 watts. It is also bridgeable to 200 watts RMS x 2 at 4 ohms, allowing for versatile sound system configurations. The amplifier includes built-in high-pass and low-pass filters, enabling users to tailor audio responses and ensure optimal signal processing for various speaker or subwoofer combinations. With dimensions of 230 mm x 195 mm x 55 mm, the compact chassis is engineered for easier installation in diverse vehicle setups. Gain settings can be adjusted on each channel to achieve desired volume levels without distortion. The JX400/4D is capable of handling a 2-ohm speaker load when operating in stereo mode, though proper impedance matching is required to maintain efficient power delivery and protect the unit from overloading.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

Brand	JL Audio
Part Number	JX400/4D
Category	Mobile Electronics

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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