Alright guys and gals, i need some advice on a box for my 4 Kicker L5 15s that i am fixing to order. I am gonna wall them and i want to tune the box to around 54-56 so that it peaks at 65-67 hz. I know i can go no wider then 54 in. wide and i have around 48 to work with in hieght. Can somebody help me design a box for them. I am thinking it should be around 16 cubes. This is going in my crew cab colorado.