Rockford Fosgate M1-8B 8" Color Optix Marine Speakers Subwoofers Balanced differential inputs are used

Balanced differential inputs are used to help control noise in the signal path

the REF507CF can be used as a focused front-stage upgrade with an appropriate source unit or external amplification

The Rockford Fosgate M2D2-12IB is a 12-inch marine subwoofer designed for infinite-baffle installations

it supports a complete speaker-and-subwoofer system from a single amplifier

Rockford Fosgate M1-8B 8" Color Optix Marine Speakers Subwoofers Balanced differential inputs are usedThe Rockford Fosgate M1 8B is a pair of 8 inch, 2 way coaxial marine speakers designed for boats, powersports vehicles, and other exposed installations. They provide a full range audio upgrade where conventional speakers may be vulnerable to water spray, salt, vibration, and ultraviolet exposure. The black grille and trim presentation suits darker interior and exterior marine installations. Each speaker uses a 4 ohm design with a 1 inch balanced dome