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Message: <blockquote data-quote="THATpurpleKUSH" data-source="post: 8680535" data-attributes="member: 615398">Nothing will change when you remove the center piece that divides each chamber. To calculate multiple ports you divide the airspace that the subs share by the number of ports you are using. Then you use that number as your volume to calculate. So you are back where you started with 1 4 inch port per 2cf. If you want to be exact and split hairs, the volume of the box will grow by the displacement of the board you are removing which is probably around .1cf. This would lower tuning by a tenth of a hz or so, which is a negligible amount that is inaudible.</blockquote>

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