Re: someone please check my math
ummm...the 1/4 wave theory is a lot different than what your trying to do. say between your sub's face and the mic you have X distance. this distance is equal to the sum of the distance from the back of the sub to the back of the box and from the back of the box to the front of the port. when it comes out of the port, the other 1/2, it ends up being, is equal to X. when doing this, keep in mind it will only work for one freq. each freq. has a different wave length. the freq. should be the resonant freq. of your car. all distances at hand totally depend on the freq. usually this is done not so much by using a port, but a 1/2 wall. most guys that have this set up you can crawl through the "port" and see the sub and everything else. the passenger side will have the sub(s) and the driver's side will be totally open. also making the corners behind the sub rounded will help guide the waves out the front.
the term "1/4 wave" come from the distance from the sub to the back of the box.
2006 Jeep Liberty
Adire Audio, Cadence, Clarion, MB Quart
Lv = [(14630000 x R^2) / (Fb^2 x Vb)] - 1.463R
*Vb = vol. in cu"
**R = sq.rt. A / Pi (for square/slot port)