Keep this number handy so when acquiring a quote or setting up a pick-up or delivery you can supply your provider with the most accurate information possible. To calculate the port length of a round port enter the diameter of the port D the box volume Vb in cubic feet and the desired tuning frequency Fb. This parameter is automatically calculated.
So it is 3645ft 3.
Box B is 60 x 28 x 45 75600. Cu ft cu in 1728. 14630000 D2 D2 FbFbVb1728- 1463 D2 Please compare your answers with other programs that include other allowances such as tapered ports. Box B has the larger capacity so I will buy that one.