Trixter

03-17-2003, 10:10 PM

Whan building a ported box, what is the formula in finding out the box size and port size to get it tuned to a certain freq.?

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Trixter

03-17-2003, 10:10 PM

Whan building a ported box, what is the formula in finding out the box size and port size to get it tuned to a certain freq.?

evo2k3

03-17-2003, 10:17 PM

Originally posted by Trixter

Whan building a ported box, what is the formula in finding out the box size and port size to get it tuned to a certain freq.?

you set the box size.....and the port area, then use http://www.jlaudio.com/tutorials/ports/images/Fb.gif

to calculate the length of the port....if your math isn't all that great it might be better to share your specs with the board and we can help you out with the calculations.

Whan building a ported box, what is the formula in finding out the box size and port size to get it tuned to a certain freq.?

you set the box size.....and the port area, then use http://www.jlaudio.com/tutorials/ports/images/Fb.gif

to calculate the length of the port....if your math isn't all that great it might be better to share your specs with the board and we can help you out with the calculations.

bumpin_8605

03-17-2003, 10:17 PM

go tho this site its pretty easy to use

http://www.carstereo.com/help/Articles.cfm?id=31

http://www.carstereo.com/help/Articles.cfm?id=31

Trixter

03-17-2003, 10:25 PM

Originally posted by evo2k3

you set the box size.....and the port area, then use http://www.jlaudio.com/tutorials/ports/images/Fb.gif

to calculate the length of the port....if your math isn't all that great it might be better to share your specs with the board and we can help you out with the calculations.

If this formula is to find the port length, then where does the freq. come in at?

you set the box size.....and the port area, then use http://www.jlaudio.com/tutorials/ports/images/Fb.gif

to calculate the length of the port....if your math isn't all that great it might be better to share your specs with the board and we can help you out with the calculations.

If this formula is to find the port length, then where does the freq. come in at?

bumpin_8605

03-17-2003, 10:28 PM

that website is a hell of a lot easier. trust me

Trixter

03-17-2003, 10:31 PM

I would like to actually know how to do it. I'm a paper and pencil kind of guy. besides, I may not always have internet access.

Natheo

03-17-2003, 11:39 PM

that site just told me to use a 7 inch wide, 9 FOOT LONG, round port in a 2.2 cubeic feet box, for a single 12" brahma. where oh where did i go wrong?

Trixter

03-18-2003, 11:39 AM

A perfect example of why knowing the formula can be sooooo helpful.

evo2k3

03-19-2003, 09:25 AM

i gave you the formula......Fb is tunning frequency......where the problem come in to play?

Trixter

03-19-2003, 11:20 AM

Ahhhh. I got it. Thanks a lot.

Trixter

03-20-2003, 12:30 PM

So what does Av, Lv, and Vb stand for and where do you find them?

evo2k3

03-20-2003, 11:14 PM

the equation came from jl's website...heres the link to the port tutorial...it should help you out....http://www.jlaudio.com/tutorials/ports/index.html