Ok I went back to the drawing board and came up with a new design that gives me 1.43998ft^3 before any displacements. I figured the port displacement to be around .03ft^3. The port is still a 3" aero at 11.75" in length and it is flared on each end. Since the subs are .1ft^3 per sub this should come out a little closer to the 1.2ft^3 at 35Hz that I was shooting for. The tricky part in trying to calculate the port displacement was trying to compensate for the inner flare of the port but I suppose that a few thousands of an inch isn't really going to affect the tuning to any noticeable degree? Again any comments or suggestions are greatly appreciated, you guys have been EXTREMELY helpful thus far! //content.invisioncic.com/y282845/emoticons/peace.gif.2db28b618ed8d1964ebbe2f5021d2c39.gif