Yeah I currently have 1 15" in a ported box and it does great, I like 15's. But I was thinking if I did two I would not have the room, I defiantly would if i were to just do a ported box, but with a 4th order i might not be able to achieve that. A Hairtrick isnt my main goal.. i just kinda threw that in there for fun. This is all going in a hatchback, so behind my back seats if i build the box up all thee way and slope it down it would be close to 10 cubic feet.
Appreciate the help thanks JDubs