We are a Rockford Fosgate authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!
The Rockford Fosgate M1D4-12B is made for environments where durability is not optional. It is tested to ASTM B117 salt fog and ASTM G154 UV standards, so it is built to resist corrosion, moisture, and constant sun exposure without losing performance. Whether it is installed on a boat or in an open-air setup, this subwoofer is designed to stay reliable and keep delivering strong, consistent bass in real marine conditions.
This sub gives you the kind of flexibility that makes system setup simple. The selectable dual impedance configuration lets you switch between 2 ohms and 8 ohms by wiring the dual 4 ohm voice coils in series or parallel, while still delivering solid output at 300W RMS and 1200W peak power. It also supports sealed, ported, and infinite-baffle installations, giving you the freedom to tune your system exactly the way you want for the kind of bass response you prefer.
The M1D4-12B combines strong performance with a clean, customizable look. The RGB lighting system behind the grille lets you choose colors like aqua, pink, yellow, or white to match your setup, while the waterproof Deutsch connector keeps everything sealed and marine ready. VAST technology increases cone efficiency for stronger bass without increasing size, and Klippel Verified engineering keeps distortion low and sound accuracy tight. With stainless steel corrosion-resistant hardware and flexible wiring options, this subwoofer delivers deep, controlled bass and long-term reliability with a style that stands out.
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We are a Rockford Fosgate authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!
The Rockford Fosgate M1D4-12B is made for environments where durability is not optional. It is tested to ASTM B117 salt fog and ASTM G154 UV standards, so it is built to resist corrosion, moisture, and constant sun exposure without losing performance. Whether it is installed on a boat or in an open-air setup, this subwoofer is designed to stay reliable and keep delivering strong, consistent bass in real marine conditions.
This sub gives you the kind of flexibility that makes system setup simple. The selectable dual impedance configuration lets you switch between 2 ohms and 8 ohms by wiring the dual 4 ohm voice coils in series or parallel, while still delivering solid output at 300W RMS and 1200W peak power. It also supports sealed, ported, and infinite-baffle installations, giving you the freedom to tune your system exactly the way you want for the kind of bass response you prefer.
The M1D4-12B combines strong performance with a clean, customizable look. The RGB lighting system behind the grille lets you choose colors like aqua, pink, yellow, or white to match your setup, while the waterproof Deutsch connector keeps everything sealed and marine ready. VAST technology increases cone efficiency for stronger bass without increasing size, and Klippel Verified engineering keeps distortion low and sound accuracy tight. With stainless steel corrosion-resistant hardware and flexible wiring options, this subwoofer delivers deep, controlled bass and long-term reliability with a style that stands out.
