http://www.e90post.com/forums/showth...ighlight=graph
This means you need a processor to flatten the output of the radio.
You have the base system 4's in the doors and back plus 6.5's glued into the under seat positions
believe
If you have the base system you don't really have enough power to make things much better.
http://www.e90post.com/forums/attach...2&d=1266451970
To those offering advice to people outside of there country the options that come standard
are different from country to country.