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Message: <blockquote data-quote="Thewes" data-source="post: 7300568" data-attributes="member: 582138">I am working on an enclosure for an 18 lms ultra, and I have a couple simple question for you guys...Enclosure will be 8^3 after displacement @ 27hz- but the thing is, I can either use 3 four inch ports at 15.5 inches, or I can use 2 four inch ports at 9.7 inches, both bring me to 27hz tuning. Am I completely missing something here? Or would both sound relatively the same, just adding one would just cost me 20 more bucks? This is all through psp inc calculator. I have built about three other enclosures with aeroports and assumed they figured in port displacement, maybe I'm wrong...Appreciate the help.</blockquote>

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