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Message: <blockquote data-quote="atlninja82" data-source="post: 6391231" data-attributes="member: 576514">hey guys i got a couple questions. im building a box for an FI BL and the site recomends 12-16 inches of port area per ft^3 and the box im using is 2.03 before displacements. after it will probably be around 1.75-1.8 ft^3. my question is how do i calculate port area? im using a slotted port so woud i just multiply the dimensions of the port 12 long x 2.5 wide? and i get 30 sq inches of port area?2nd question- ive used a lot of port calculators and one told me only 6 inches of port length to tune at 36 hz which i know cant be right. but then i used a few others and they said anywhere from 28-32 inches. why is it so long? can i increase the port area so the port doesnt have to be so long?</blockquote>

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