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correct formula for port displcement

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=38713
Printed Date: July 07, 2025 at 10:41 PM


Topic: correct formula for port displcement

Posted By: gcorrea
Subject: correct formula for port displcement
Date Posted: September 07, 2004 at 12:06 AM

so far ive gotten the following formulas for calculating port displacement but i end up with different answers every time. wich is the real formula.anybody ?  

1. 3.14*radius*radius*length of port

2. area*length=volume   where area is equal to radius  squared times 3.14

3.vp=(lv-ex)*pi*(dout/2)^2

where vp= volume of port

lv=port length

ex=enclosere thickness

dout=out side diameter of port



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gcorrea



Replies:

Posted By: auex
Date Posted: September 07, 2004 at 1:18 AM
It should be; V=pi x R(squared) x Height.

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Posted By: gcorrea
Date Posted: September 07, 2004 at 1:52 AM

thank you.



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gcorrea





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