lol nice... yea this was behind the seat in a sealed box i built, but passengers had almost very little leg room, so he took it out and went subless for about two weeks, since hes at home but im away in college good luck fitting a 15 where we put the 12, its a snug fit but i think its maneagable, i dont know volume requirements on that 15 but this box is about as large as possible and 1.75 around 34, then we added buffalo snow polyfill to get it closer to 2 @ 32, but sealed you should have no problem