its easy when u have sponsers (unlimited money) and a car like this.
basically ppl know only 3 types of enclosures
1) sealed
2) ported
3) bandpass.
but now a new type of enclosure is picking up which is called "wall". u built a wall behind ur ear and hook all the speakers there. with a big port. what will happen if i lock someone inside the trunk and play the woofer??? the same concept goes for walling.