http://www.e90post.com/forums/showthread.php?t=343673
nobody seems to be using Morels in the under seats currently its
always Jehnerts or Earthquake SWS-8's 90 percent of the time
lately. Gladen(audio systems ) seems to come up once in awhile.
Jehnerts seem to fit better than anything else.
Also they are incredibly accurate but not cheap.