hey every one i have 4 12 inch compvr daul voice 4 ohms my box is 33 1/2 by 26 1/2 by 14 two subs face up 2 fire at the back lights . i had a shop build it .it has 2 mirrors on the bottom and there is one wall seperating the other two so two subs in one chamber so i only hit 131.9 now the...