I did my system and this is what I did
http://www.e90post.com/forums/showthread.php?t=195939
http://www.e90post.com/forums/showthread.php?t=251282
also look at Mike's ride
http://www.speednsound.co.za/forum/v...6d966e6b541b79
I'm changing my setup now to include 2 x 12's but will post pics as soon as I complete my new box.
Good luck with your project!