To have any kind of sub bass sound, unless willing to completely mod your interior, you may have to sacrifice space ( a little ) you can always remove a sub box if hauling any items in the back storage area. Un like what others may have said, a sealed enclosure, DOES sound good for sub bass, and have a reduced size box, taking up space. I can appreciate the sound coming from a couple of 10's, if you want tight accurate bass then go with that in a sealed box, For a bit louder, more of boom sound (pending on music you listen to), then go with ported box, though bigger in size. I personaly use on 13-inch race track shaped sub, in a sealed box, does not take up that much space, and sounds incredible. When I know I'll be needing the space, I just take it out and leave it at home temporarily. Amps are mounted under the 2nd row seating out of the way.