JL Audio
JL Audio MV400/4i 400W 4-Channel Marine DSP Amplifier 010-03337-00 (98637)
JL Audio MV400/4i 400W 4-Channel Marine DSP Amplifier 010-03337-00 (98637)
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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
| Model | MV400/4i |
| Garmin PN | 010-03337-00 |
| JL Legacy PN | 98637 |
| Total Power | ≈400W total system output |
| RMS @ 4Ω | ≈75W × 4 |
| RMS @ 2Ω | ≈100W × 4 |
| Bridged @ 4Ω | ≈200W × 2 |
| Amplifier Class | Class-D (NexD2™) |
| DSP | Integrated; configured via TüN™ |
| Inputs | RCA + speaker-level |
| Marine Build | Corrosion-resistant chassis and hardware |
| Voltage | 12–16 VDC typical |
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
Fitment & Installation Help
Need help confirming fitment or installation parts? Use our Fit Guide or contact us through the chat button before ordering.
Authorized Retailer & Warranty
MCOR Automotive is an authorized JL Audio / Garmin retailer. Products purchased from MCOR include applicable manufacturer warranty coverage when installed and used according to manufacturer guidelines.
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