need help and inputs in building a box for my FI SSD 15 with options. to be powered by sound magus x1502, i usually listen to house and hiphop music,but now i want to achieve more lows... i used to have a JBLp1222 on a sideport box,now im going to use a 15" so i dont have that much idea on how to work on the box (box dimensions,port etc) i hope someone could help me.im going to put it in a minivan (mitsubishi adventure) thanks Guys.