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Message: <blockquote data-quote="GearGuy2001" data-source="post: 4963478" data-attributes="member: 567661">The rule of thumb is 13-16 square inches of port per cubic foot of box. So there is nothing wrong with going 2" across the full face but with the mid port or L port box you need to go with a wider port in order to achieve the correct amount of port area (otherwise you could get chaffing(sound))Also with the midport box (like i did with my subs) as you may know it would be dangerous for one sub to fail (in a multi sub setup) if they were in the same chamber so with the midport box each sub has its own chamber and really wouldnt be effected if the other sub failed.</blockquote>

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