Sold my e90 (335i sedan) and pulled out my audio system including my custom built fiberglass enclosure that held a 12" Image Dynamics IDQ. It fits perfectly in the rear left trunk pocket area. $250. Price is without the sub. I will include the IDQ12 for + $100.
The bass output was more than perfect for me. Very tight and could play low. I ran this sub off a Zapco DC 650.6 ch 5/6 (~380W at 2ohm).
