2-to-4 channel adapter for standard / radio only wiring premium wiring This is the OEM mounting

This is the OEM mounting hardware needed for the factory Blaupunkt QuadroBoost trunk amplifer

Just tap into the white wire on your radio harness behind the radio opening

For cars with the OEM power antenna setup

lighting or a small powered subwoofer

2-to-4 channel adapter for standard / radio only wiring premium wiring This is the OEM mountingExactly equivalent to BMW part number 65 12 1 379 329. Plugs into fader connector of a 2 channel standard radio only audio system. With this adapter you can run an OEM 4 channel radio like the CM5908 or KE83 ZBM without a trunk amplifier in a car with 2 channel radio only wiring. Also compatible with Amp+ if your car has 2 channel standard radio only wiring.