I got an acura tl and only an arm rest folds down on the backseat so thats the main problem. With a 10" i think i would be able to face it forward and then port out of the top of the box through the rear deck where the stock sub used to be. The treo is a beast though, with the box facing back it sounds like my trunks gonna explode and its already dynamated pretty good.badass sub right here...4" coil and underrated at 2500w daily. Sucks that it takes up too much space. what car do you have? Maybe you should try sealing it off from the trunk. An SA Nightshade would work better in smaller space.
Just bought an AQ2200 for the 9512 should be hooking it up next week.