Rockford Fosgate PM600X4 Punch Marine 600 Watt 4-Channel Amplifier (PM600X4) RP504CII are two proprietary 8-pin female

are two proprietary 8-pin female connectors to connect two Kenwood KCA-RC107MR marine wired remote controls

Cross-multiplication of the hot and cold outputs by the differential output circuit

This optimization is crucial

Alpine i407-WRA-JK Restyle Head Unit

Rockford Fosgate PM600X4 Punch Marine 600 Watt 4-Channel Amplifier (PM600X4) RP504CII are two proprietary 8-pin femaleRockford Fosgate PM600X4 Punch Marine 600 Watt 4 Channel Amplifier The Punch Rockford Fosgate PM600X4 multi channel amplifier is versatile enough to power any audio system configuration. The variable HP LP crossover and built in Punch EQ allow for precise tuning of Bass frequencies and the Pass Thru RCA jacks provide flexibility as your system grows and keep Y adapters to a minimum. A powerful, versatile amp The Rockford Fosgate PM600X4 is a 600 watt