port lenght math?

[vice24 0]

I found a formula that seems to work at http://www.caraudio911.com/ under designing a ported box. But I was wondering why on step four they say to subtract half the port width from the port lenght to get your physical port lenght? When I made my box I dont think that I did this so I may be building a new one if this is important. I was also wondering if this formula works or has been used by anyone here?

[ANeonRider 3]

End correction, if you are using one of the walls as the other side of the port.

Not going to be a big deal overall.

[helotaxi 46]

I was also wondering if this formula works or has been used by anyone here?

It's a standard formula. Yes it works. And yes, everyone who has designed a ported enclosure has used it. Even if they used a computer program to design the box, the program uses the same formula.

[vice24 0]

I was also wondering if this formula works or has been used by anyone here?

It's a standard formula. Yes it works. And yes, everyone who has designed a ported enclosure has used it. Even if they used a computer program to design the box, the program uses the same formula.

Cool, I had just found a few other formulas out there while surfing and was curious if I had picked the wrong one by chance. Thank you for your help!