[Technic]

Originally Posted by justinluv949

I have a 2011.5 M3 convt, with the
676 Hi-fi sound system
(the car does not have the 752 Enhanced Premium Sound)
I want to add a sub amp to the system. So I need to know what wires from the head unit to the factory amp I need to tap into to get low frequency sub signal, and is it possible to get a remote turn on from the wires going into the factory amp. Pictures would be great but just colors of wires, and info on the wires is good enough for me.
Thank you for all your help.

http://www.e90post.com/forums/showthread.php?t=411856