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Message: <blockquote data-quote="Jeffdachef" data-source="post: 8312829" data-attributes="member: 650438">16 x 16 x 20 will give you around 1.7-1.9 usable cubic feet net airspace kinda small for the sub. You can try building a box with those dimensions and doing a 4 inch aeroport, I think that would be your best bet and the easiest way to do it.  With a slot you'll have a hard time getting a lower tuning then 40 without sacrificing port area and net cubic feet airspace.so a 16 x 16 x 20 box with a 4 inch aero thats 12 inches long which would result in a tuning between 34-35hz tuning leaving you with 1.9 cubic feet airspace and its also 4 inches away from the rear wall. If you want to have lower tuning then let me know what tuning you want</blockquote>

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