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Message: <blockquote data-quote="PowerNaudio" data-source="post: 1659498" data-attributes="member: 561215">on ported enclosures i usually glue a single layer of pollyfill on the back wall to absorb any mechanical noise that the sub may make.you can also use it if you made the enclosure a bit too small, it will make the sub think is in a bigger enclosure since pollyfill slows down the sound wave and also for fine tuning your enclosure some.</blockquote>

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