Calculating Port Size

If I have two Skar SDR 8s that require cubic feet for a ported enclosure with square inches of port area for 39 HZ What should

port area inside your enclosure The given rule is that per cubic Are you looking to build a slot port enclosure, or one with an aeroport?

slot bonus no deposit required I also came with this idea The red section is just all the port area section that enclosure needs to be tuned, green section is the same slot

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