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Message: <blockquote data-quote="iLL Ridge" data-source="post: 7075210" data-attributes="member: 626512">I think the smaller port opening can cause port noise. The exit speed of the air can be very fast with a smaller port opening, even though you can tune to the same freq as a larger port area. I have a 4cubes net box tuned to 28 and 56sq in of port area and can still hear some noise coming from the port on 20hz test tones.I don't think the dimensions of the box matters as long as you have enough clearance behind the sub motor.What 15 you puttin in there?</blockquote>

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