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Message: <blockquote data-quote="mklett33" data-source="post: 7964141" data-attributes="member: 604057"><p>Having designed a million boxes using that program I would say that you would definitely get a graph above 65 ft/s, which is kind of the rule of thumb for port noise. Plus with such a large ratio you are introducing other issues. I know you are likely keeping the post thin to minimize length of the port but you will def want to  go at least 2 inches wide, if not 3. This will result in a larger port, but lower air port velocity.</p></blockquote><p></p>

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