Yeah the only downside to the PB15 is that it takes over 3 cubic feet of your trunk away, My box is a 3.254578432747575... cubic foot box that takes up the end of the trunk, I still have more than enough trunk room for me though.
This is perhaps the nicest sounding sub I have ever heard and it will put out decent SPL too, but SQ is this sub's reason for being, it is super efficient. I would not trade it for any other sub. Like I said, if you have room for the box in your trunk, this is your best choice for SQ I have no doubt about that. Dave will agree here. Other suggestions include the Daytons, Shiva, and Blueprint, but if you hae the cash this is it.
1996 Contour "Mean Green" (99-02) 2002 Malibu Blue Focus ZX5 - something to hold the PB 15...