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<blockquote data-quote="BassAce" data-source="post: 3160380" data-attributes="member: 555970">So I&#039;m guessing you want the port to be the height of the enclosure, so the height of the vent is going to be 21.5 inches.&nbsp; I&#039;m going to use this calculator to give an estimate of the length of the port:&nbsp; <a href="http://www.carstereo.com/help2/Articles.cfm?id=31" target="_blank">http://www.carstereo.com/help2/Articles.cfm?id=31</a>I place 21.5 for the length and 9 for the width.&nbsp; It would be wise to make the width to a number that would be easily measured on a measuring tape.&nbsp; And I got 29.24 inches for the length of the port.&nbsp; With the calculator I just used and showed you, I&#039;m not sure if they calculate the end correction.I would recommend you plugging in 29.24 into this formula and see if you get 31Hz as an answer:<a href="http://mobile.jlaudio.com/support_pages.php?page_id=165" target="_blank">http://mobile.jlaudio.com/support_pages.php?page_id=165</a></blockquote>

[QUOTE="BassAce, post: 3160380, member: 555970"] So I'm guessing you want the port to be the height of the enclosure, so the height of the vent is going to be 21.5 inches. I'm going to use this calculator to give an estimate of the length of the port: [URL="http://www.carstereo.com/help2/Articles.cfm?id=31"]http://www.carstereo.com/help2/Articles.cfm?id=31[/URL] I place 21.5 for the length and 9 for the width. It would be wise to make the width to a number that would be easily measured on a measuring tape. And I got 29.24 inches for the length of the port. With the calculator I just used and showed you, I'm [B]not[/B] sure if they calculate the end correction. I would recommend you plugging in 29.24 into this formula and see if you get 31Hz as an answer: [URL="http://mobile.jlaudio.com/support_pages.php?page_id=165"]http://mobile.jlaudio.com/support_pages.php?page_id=165[/URL] [/QUOTE]

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