Ported box question

Buffalo Soldier Bronze Member Username: Lilnomad Marathon, Florida U.S.A. Post Number: 13 Registered: Jun-06	Posted on Friday, June 02, 2006 - 18:35 GMT how do u calculate for ported boxes,do i need 1 for two type r's,how do u tune it?????
Alex Barre Bronze Member Username: B_son Post Number: 51 Registered: Apr-06	Posted on Saturday, June 03, 2006 - 12:42 GMT i don't know the answer but id like to also know so...Bump
Rave'n Gold Member Username: Goatin Ohio U.S.A Post Number: 1295 Registered: Jan-06	Posted on Saturday, June 03, 2006 - 13:38 GMT http://www.subwoofertools.com/forum/ported-box.asp?Ew=37&Eh=17&Dia=6&Xmax=18.2&V d=.071&NumW=2&Vb=4&Fb=32&Qts=.47&Vas=1.589160015&Fs=29&CE=1.5 Here ya go.