what size is his box? cu ft wise? im wondering if something like this would fit in the extended cab of my truck, but i wouldnt want a wall, it would just need to be a box, i had a 7 cubic foot box back there no problem with plenty of room left, it held my 2 idmax's, id like to put 2 12" btl's back there now, i hit a 144.x with them(id max's) in my first box but it was a bit off and my one amp wasnt putting out full power, how would the btls compare?