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Message: <blockquote data-quote="bump&#039;n" data-source="post: 2513309" data-attributes="member: 572990"><p>My subwoofer's spec's state: 1.15 cf to 1.45 cf of air space ported and 1.75 cf to 2.00 cf of air space sealed. I have talked contacted 2 dealers and  manufacture and they all gave me the same spec's. Is this normail,arn't ported box's usaly bigger than sealed. Just seem's funy. Also what affect will changing port size and lenth do to the speaker's out put other than change the tuneing freq.   Do "Areo port's" also called "prescion port's" make a diffrence over round  and slot port's ?</p></blockquote><p></p>

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