need some help with port length

[Bumpin300 0]

Hello,

I have a box designed and it currently has 4.6 cubic feet net internal volume after wall thickness/drivers/bracing. I would like to port this box and the port face is 13.5hx4w. What length would the port need to be to tune the box to 33hz and 35hz? Also what would the lenght need to be if the port face was 13.5hx4.5w?

Thanks

[ANeonRider 3]

http://www.diysubwoofers.org/misc/portcal.htm

[Bumpin300 0]

http://www.diysubwoofers.org/misc/portcal.htm

ok so i went to that page and I am trying to solve for dv as you must solve dv seperately when you have a slot port. but I am stumped on what the ^0.5 means in the equation - Dv' = 2*((W*H)/pi)^0.5

thanks

[Tommythecat 0]

square root. Power of 1/2 .