[328i_E92_2007]

Originally Posted by ctuna

f you have an 07 and the amp is silver you have L7
L7 is also identified by the center dash speaker and
equalizer controls instead of simple bass and volume in the
radio or idrive.
Also in 07 the L7 was standard in the 335.

The Technic sub adapter is usually used for this.

subwoofer threads
http://www.e90post.com/forums/showpo...2&postcount=66
http://www.e90post.com/forums/showth...t=Ultimate+Sub
http://www.e90post.com/forums/showth...ight=subwoofer

http://www.technicpnp.com/product_pu...eries_E90.html

I don't have center speaker or equalizer. Just bass and treble. Non-idrive and also 328 not 335. But ill take a look at the links you posted. Thanks!