ok, i have the reg can in my sig and, the the box is 2.5 cubes tuned @ 35hZ. its to big for my truck. i dont mean the actuall size. i mean the set up is to much for that little cab. its hard to get loud. so im thinking of going with 2 10's bhind each seat. ported. my friend and his dad and, i built a box that 1.75 cubes tuned at 38Hz and, in my truck it gets loud. we were both impressed. keep in mind this is a kicker 10" comp. so im think 2 10" cvr's. behind each seat. i have a kicker zx750.1 putting out 930wrms. any suggestions. by that i mean, different sizes. brands subs........... thank you. i think its just the simple fact that its a small truck, i cant get loud. i threw it in my friends car and it was awsome. so i need something smaller and, more practical. thanks guys.