[Justin7894]

There are a couple threads that discuss installation of an aftermarket trunk, amp and sub setup, but there is a hodgepodge of ideas and no definitive method.

There needs to be something out there with pics.

I found 1 thread that contained step by step descriptions with pics, but the pics were no longer hosted.

http://www.e90post.com/forums/showth...+amp+subwoofer

http://www.e90post.com/forums/showth...=subwoofer+diy

[Technic]

... the easiest way to add a trunk sub to the Logic7 system is this: http://www.e90post.com/forums/showthread.php?t=387678

[kaigoss69]

Word! Just hook the harness between the amp and the existing connector and everything else is self-explanatory. Literally a 30 minute job to add some bump to your ride.