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Message: <blockquote data-quote="audioholic" data-source="post: 2790288" data-attributes="member: 549629">I just punched in the numbers real quick into WinISD. According to it, with a box volume of 4 cubes (net), and approx 100 sq inches of port area (I put in a 4x25" port), the port length would need to be over 65" long to achieve a tuning point of 30hz.100 inches is ALOT of port area, and 30hz is low tuning point, both of which increase port length. So yeah, you're are gonna be needing a long port to accomplish your goal.</blockquote>

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