Any one install subs in their 6er

[All-Or-Nothing]

I was wondering if any one has done this and how involved was the process. Also what speaker wires would I tap for the sub signal.

[m630]

I was wondering if any one has done this and how involved was the process. Also what speaker wires would I tap for the sub signal.

you already have 2 subs in the car if you have the prem sound pack, they are under the front seats....perhaps you can tap into that source.....