Just as says this was in back end of my Cobra the subs are 8" jbl's with kenwood amps and mtx crossover. This stuff is all mounted to a custom fitted 1" piece of wood. $150 takes the set-up and will throw in a kenwood 6 disc changer and cass deck with remote.
http://img17.imageshack.us/img17/5716/vopa.jpg
http://img29.imageshack.us/img29/629/zkln.jpg