View Full Version : Lets talk ports?

01-18-2004, 12:02 AM
K.. I'm having a lot of trouble designing a ported box. Everytime I think I've got it, I'm wrong. Is there a simple equation that determines frequency? Such as.. Volume of box / volume of port?

I've seen those little web page calculators that determine round port volume, but I **** at math. I can't figure out the same-volume demensions of a slot port. There an equation for this as well?

01-18-2004, 01:46 AM
volume of a cylinder is lengh x area

V= L x A

Volume of a box is the Height x width x depth

V= H x L x W

Find the volume of your round port and then use the size slot port you want to make and that will tell you your lengh.

01-18-2004, 11:40 AM
Tuning freq. is determined by the cross area of the poprt, not the actual volume. Here is a formula that shoe you the way...how simple it is depends on your level of math.