Hey so you fit a 13 behind the seats? Can you please hit me up with some more details? Do you have any pictures? I can't see how it's possible, but i'd like to do that. Thank you!I did the stealth box 13 enclosed spoundstream for like $300-350 with amp and wire...self installed. It's behind the seat so there's no lost storage or exposed equipment to allure theft. I get enough sound from it to enjoy full range of music , especially being a 13" driver it hits some lows.