Fusion Wire Harness f/ MS-RA670 & MS-RA770 Stereo - Zone 1 & 2 (B Port-RCA)

The Fusion Wire Harness for MS-RA670 & MS-RA770 Stereo is a dedicated interconnect cable designed for boaters and anglers who demand clean, reliable audio integration in demanding marine environments. This Zone 1 & 2 B Port-RCA harness bridges your Fusion marine stereo to a compatible Fusion amplifier, unlocking multi-zone speaker and subwoofer configurations that transform cabin acoustics and entertainment flexibility on the water. Whether you're upgrading a center console, sportfisher, or cruiser, this harness delivers the connectivity backbone for zone-based audio control without compromise.

Built specifically for Fusion's marine-grade ecosystem, this wire harness features RCA inputs that enable AUX 1 source integration, allowing independent audio routing to Zone 1 and Zone 2 outputs. The compact design—weighing just 0.1 lbs with dimensions of 5 x 1 x 5 inches—fits neatly behind dash installations and through tight helm areas common on fishing and pleasure vessels. Marine-certified construction ensures the connectors and shielding withstand salt spray, humidity, and electrical interference, critical factors when operating in coastal or offshore conditions where standard automotive harnesses fail prematurely.

This harness is essential for owners of MS-RA670 or MS-RA770 Fusion stereos planning to expand beyond factory single-zone audio or add a subwoofer amp installation. Installation is straightforward for anyone comfortable with basic marine electrical work, requiring connection between the stereo's B port and your Fusion amplifier's RCA inputs. If you're building a professional-grade marine audio system or upgrading existing single-zone playback to independent cabin and engine room zones, the Fusion Wire Harness delivers the reliability and compatibility that keeps your system performing through seasons on the water.