6.22 after sub n port u will be around 5 cubes which will workOk.. in haven't accounted for sub displacement which is only .2
Also I havent figured out my port length or displacement. .
I have 2 general depth sizes that I can work with...
1.5 ft of depth will give me 6.22 ft^3
1.25 ft of depth will give me 5.187 ft^3
Which would be closer to the volume that I want so that I would have enough volume after displacement..