hey guys, this is my first time ever doing somthing like this. I wanted to make a Ported box for a Fi Bl 18in Dual 1 ohm. They recomend it should be tuned at 32hertz. 5-10cubic feet,12-16in^2 per cube of internal volume after displacements, my desire demsions for the box is 37W by 15 height by...