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» Termpro Audio Forum » Installer's Corner » SPL » Port question

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SilverBane
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Having some issues with port length calculations.

Have tried this site: http://www.carstereo.com/help2/Articles.cfm?id=31

Have tried Subwoofer DIY.

I am running a 2 cube box and am looking to get about 40-45 Hz with external port on 4" ports, but with the site above, it is saying I need something like 18" per port for a pair and up to 40" for 4 of them.

Yet if I drop to a single 4" port for the sub, it says I need only 8". This is confusing me a little.
Posts: 6 | From: Edmonton | Registered: Jul 2007  |  IP: Logged | Report this post to a Moderator
Wagonized
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more port area requires more port length to maintain the same tuning.

shortening the port will raise the tuning

--------------------
Dustin Page
97 explorer
155.8
Team Deaftraps
Team Blackawk SPLz

Rebuilding for 09

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Posts: 712 | From: abbotsford, bc, canada | Registered: Oct 2005  |  IP: Logged | Report this post to a Moderator
   

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