JL Audio MV400/4i 400W 4-Channel Marine DSP Amplifier 010-03337-00 (98637)

JL Audio MV400/4i is a compact marine-rated 4-channel Class-D amplifier with integrated digital signal processing (DSP), designed to drive high-performance full-range speaker arrays with clean, controlled output. Its NexD2™ switching topology and TüN™ DSP interface enable precise tuning, crossover alignment, EQ, and delay adjustments for cockpit, tower, or cabin zones.

Rated for 400 watts total output, the MV400/4i is optimized for four-speaker marine configurations or bridged stereo tower loads. With its marine chassis, corrosion-resistant hardware, and DSP tuning capability, it supports OEM-plus 12-volt integrations where audio clarity, headroom, and durability matter.

Key Features

• 400W marine DSP amplifier for full-range multi-speaker systems
• Four channels of Class-D NexD2™ amplification
• Approx. 75W × 4 @ 4Ω or 100W × 4 @ 2Ω (14.4V)
• Bridged: approx. 200W × 2 @ 4Ω
• Integrated DSP via JL Audio TüN™ software
• Flexible crossover, EQ, routing, and delays
• Corrosion-resistant marine construction

Technical Specifications

Ideal Applications

• Four-speaker marine cockpits and cabins
• Bridged stereo tower speaker configurations
• Powersports DSP-tuned full-range builds
• OEM-plus 12-volt integrations requiring DSP

What’s Included

• JL Audio MV400/4i amplifier (010-03337-00 / JL PN 98637)
• Power and speaker harnesses
• USB tuning cable for DSP configuration
• Mounting hardware and documentation

Why Buy From MCOR Automotive

• Authorized JL Audio dealer
• Marine DSP system design and amplifier matching expertise
• OEM-plus tuning workflow for reliability and clarity
• 20+ years advanced 12-volt experience