I have 2 JL Audio 10W3V3s each in its own sealed enclosure made from 3/4" MDF and built to JL Audio's specs (18"Wx11"Hx9"D) *0.625cu. ft.* I was wondering how to mount the enclosure under the seat........Firing up into the bottom of the rear seat? Firing out from under seat towards the back of the front seats? Firing down into the floor? Any info will be GREATLY appreciated.