yes....a comparison but i think its worthy

[tRiGgEr 5,000+ posts]

Normally people say the actual size after all displacment then the tunning. Like I have a 2.0ft^3 box tuned to 35hz. But it is actaully around 3.23ft^3 before driver and port displacment.

So you would need to use the 3 cubic feet volume in determining an outside port length