L7 has a center speaker in the dash and will have a graphic equalizer controls
in the radio display. Hi Fi no center speaker in the dash and only simple bass and
treble controls.
System descriptions in the following downloads
http://www.e90post.com/forums/attach...2&d=1266451970
http://www.e90post.com/forums/attach...2&d=1260829447
The a2dp streaming bluetooth is only offered in the newer models(like 2011 only I think)
there are some aftermarket solutions but I don't know how they work
with the older cars that already have bluetooth
google denison bluetooth gateway
there was just another post on this apparently is has some limitations
http://www.e90post.com/forums/showthread.php?t=585932