I have a 12 inch sony explode...i have 2 8 inch pg subs..i have a 6X9 inch jenson with 2 tweeters in it...i want to put them in one box the 12 in the middle the 8's to the left and right...the bottom of the 8's i want to be at the level of the middle of the 12...and i want to create a place for...