JL Audio XDM400/4 400W 4-Channel Marine Amplifier

The JL Audio XDM400/4 (010-03115-00) is a 400-watt ultra-compact 4-channel Class D marine amplifier engineered for boats, wake towers, and car audio systems requiring high-output performance in tight spaces.

Delivering 100W x 4 at 2 ohms and 75W x 4 at 4 ohms (14.4V, 1% THD), this marine-grade amplifier features JL Audio’s advanced NexD™ high-speed switching design for full-bandwidth sound, low distortion, and exceptional efficiency.

Finished in sleek black powder-coat with a gasketed control cover, the XDM400/4 is ideal for marine speakers, cockpit systems, wakeboard towers, or compact under-seat installations.

Class-D 4-Channel Marine Amplifier

The XDM400/4 packs serious full-range power into a compact chassis, making it perfect for marine audio upgrades and tight installation areas.

• 100 W x 4 @ 2 Ω (14.4V, 1% THD)
• 75 W x 4 @ 4 Ω (14.4V, 1% THD)
• 400 watts total system power
• NexD™ high-speed switching technology
• Full-bandwidth Class D operation
• Extremely low distortion and high efficiency
• Compact footprint fits under seats or inside consoles

Built for Marine & Automotive Environments

Engineered with marine-grade materials, the XDM400/4 performs reliably in boats and vehicles exposed to vibration and moisture.

• Marine-grade construction
• Black powder-coat finish
• Gasketed, removable top cover protects controls
• Corrosion-resistant internal components
• Suitable for boat, wake tower, and car audio installations

Waterproof Rating: Not submersible (marine-grade construction for moisture resistance)

Flexible System Configuration

Designed for versatile installations, the XDM400/4 can power multiple speaker layouts or integrate into larger marine audio builds.

• Power four full-range speakers
• Power two speakers plus a subwoofer
• Pair with JL Audio XDM600/1 monoblock for a 1000W system
• Ideal for wakeboard towers, cockpit speakers, or full-boat audio systems

Advanced Tuning & Control

The XDM400/4 provides professional-grade tuning flexibility for precise system optimization.

• 12 dB/octave crossovers for each channel bank
• Configurable as low-pass or high-pass filters
• Continuously variable crossover frequency: 50–500 Hz
• Dual-mode input filter for noise-free performance in boats or cars
• Automatic turn-on via signal sensing or DC-offset sensing

Optional Accessories (Sold Separately):
• HD-RLC Remote Level Controller
• MHD-RLC Water-Resistant Remote Level Controller

Remote controllers allow adjustment of all channels or rear channels directly from the cockpit or driver’s seat.

What’s Included in the Box

• JL Audio XDM400/4 4-channel amplifier
• Removable gasketed top control cover
• Installation documentation

Warranty Information: Manufacturer warranty included (Authorized JL Audio retailer coverage applies).

Technical Specifications

Power Output

• 100 W x 4 @ 2 Ω (14.4V, 1% THD)
• 75 W x 4 @ 4 Ω (14.4V, 1% THD)
• 400 watts total system power

Amplifier Details

• Channels: 4
• Amplifier Type: Full-range Class D
• Technology: NexD™ high-speed switching

Installation & Design

• Ultra-compact chassis
• Black powder-coat finish
• Marine-grade construction
• Gasketed control panel cover

Owner's Manual (pdf)

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.