well i have a box and it's got 3x 4 inch port's and i want a slot port .. it's not that hard to change ... 1 jig saw and cut stright line's.. well i need to know the size and linght of the slop port .. box size is ..... 35 inch width 15 inch deep and 15 inch high 3.5 cuft it's for spl .. and my car peak's at 65 ... so i need it to be tuned to 60 .... thank's heep's

please close this !!! i got my answer !