Bmw E90 (Option 677/688) Subwoofer Amp Add On Harness

Description

Your car must come equipped with audio option 677 or 688 for this to work.
The 480W Logic7/HK harness/LOC is exclusively designed to add an aftermarket amp to the OEM amp to power a trunk sub or/and underseat woofers. No OEM wires cut, spliced or tapped. Remote turn on signal included.(Pink wire)
Harness plugs in between the OEM amp and LOC converts the high-level OEM amp woofer signal outputs into low-level aftermarket amp signal inputs for a subwoofer or/and to power the under seat woofers.