the gauge wires are in the original post lol
no its 5p/6g that will be changed soon
i know the 15s are overkill but thats how i like my stereos(have 5 8in subs in room)

on the box yes it was cut in half just to fit, in the processes one of the ports had to be sacrificed, i also want some trunk space (could be done easily but i need help with the design for the good sound)

oh and with the back seat out it would only be 12in of space and that box was 16*40*17
and what size of wire should i use for the big 3?