JL Audio M3 10-inch Marine Subwoofer for Infinite Baffle – Gunmetal Sports Grille (4 Ω)

Legendary Sub-Bass Performance. High Value. Space-Saving Infinite Baffle Engineering.

Add rich, hitting low-frequency power to your vessel without breaking the bank or sacrificing your valuable storage zones. The JL Audio M3-10IB-S-Gm-4 is a high-performance 10-inch marine subwoofer purpose-engineered to deliver true sub-bass punch in an easy-to-integrate, open-air design.

As a dedicated Infinite Baffle (IB) driver, this subwoofer is acoustically optimized to operate perfectly without a custom subwoofer box. It relies on the open air inside your boat's bulkheads, seat bases, or side gunwales to function as a giant natural enclosure. Swapping traditional white marine styling for an aggressive, split-spoke Gunmetal Sports Grille, this subwoofer brings a sleek, premium dark metallic look that beautifully accents carbon-fiber dashes, modern grey vinyl, and performance gelcoats.

Key Features

• Infinite Baffle (IB) Architecture: Purpose-built to thrive without a dedicated sub box. Mount it directly into a standard boat panel to enjoy deep, clean bass while keeping your dry storage spaces completely clear.

• Legendary JL Audio Value: Engineered by the undisputed masters of marine audio, the M3 series delivers incredible excursion power and tight low-end tracking at an accessible, high-value performance tier.

• Premium Gunmetal Finish: The dark metallic multi-spoke sports grille cuts out standard white marine elements, replacing them with a stealthy, athletic custom accent that mirrors modern sportboat design.

• True Marine® Certified Construction: Fully armored against the harsh open water. Utilizing advanced UV-resistant polymer baskets and marine-grade synthetic components, the M3 line offers complete defense against saltwater corrosion, moisture ingress, and sun fading.

Technical Specifications

Dimensions & Mounting Information

• Outer Diameter: 10.75 in / 273 mm

• Mounting Hole Diameter: 8.875 in / 225 mm

• Mounting Depth: 5.12 in / 130 mm

• Driver Displacement: 0.050 cu ft / 1.42 L

Simplified Two-Wire Install: Because this model features the non-LED grille option, installation is entirely straightforward. There are no extra lighting controllers or secondary 12V DC power wires needed—simply hook up your positive and negative speaker leads directly to your marine amplifier.

What’s in the Box? Sold individually (one 10-inch M3 infinite baffle marine subwoofer with an integrated gunmetal sports grille), premium marine-grade stainless steel mounting screws, and a precision cutout template.