Rockford Fosgate M2D4-12I 12" DVC 4-Ohm Color Optix™ Infinite Baffle Marine Subwoofer

Overview

Big bass. No box.

The Rockford Fosgate M2D4-12I is a 12" infinite baffle marine subwoofer built for clean installs where you don’t have space for an enclosure. It delivers strong, full low-end using the mounting surface as the enclosure.

What It Is

A free-air (infinite baffle) marine subwoofer.

• 12" subwoofer
• Dual 4-ohm voice coils
• Switchable impedance (2Ω or 8Ω)
• Designed specifically for infinite baffle installs

No box, no wasted space—just mount and go.

Performance

Strong output with clean response.

• 400 Watts RMS / 1600 Watts Peak
• Sensitivity around 88 dB
• Designed for open-air / free-air environments

This gives you real low-end without sacrificing storage or layout.

What Makes It Different

Built for space-saving installs.

• Infinite baffle design → No enclosure required
• VERSA switch → Easily set impedance without rewiring
• VAST surround → More cone area, more output
• Optimized specifically for marine mounting surfaces

Lighting & Integration

Part of the Color Optix system.

• Integrated RGB lighting
• Compatible with Rockford Color Optix controller (Sold Separately)
• Plug-and-play style connections

Built for the Elements

Made for real outdoor use.

• Element Ready™ design
• IP67-rated (dust tight + water resistant)
• UV and corrosion resistant materials
• Marine-grade terminals and connectors

What It’s Best For

• Boats with limited space for enclosures
• Free-air / infinite baffle installs
• Clean, factory-style integrations
• Systems needing strong bass without bulk

What’s Included

• M2D4-12I Subwoofer
• Stainless & sport grille options
• LED wiring harness
• Mounting hardware

Specifications

Size:

• 12"

Power Handling:

• 400 Watts RMS / 1600 Watts Peak

Impedance:

• Dual 4Ω (2Ω or 8Ω selectable)

Mounting Type:

• Infinite Baffle (Free-Air)

Voice Coil:

• Dual Voice Coil

Quick Questions

Q: Do I need a box for this?
A: No—this is designed specifically for free-air installs.

Q: Where does this get installed?
A: Panels, bulkheads, or any sealed mounting surface separating front/rear wave.

Q: What’s the difference vs the “S” version?
A: This is free-air. The “S” version requires a sealed enclosure.

Note

• Requires proper infinite baffle mounting surface
• Not designed for sealed or ported enclosures