sry.. i was hasty with that first post... so now i make things easier i hope.. i mean that i want port in metric system.. because its hard to me keep up with ft3 and inches.. and then i founded to hard realize what this mean in metric and littres "Minimum Area = 45.8 inches" when i used this link to calculate minimum port. got 2 sa-8v2 yesterday so its time to make good enclosure plan.