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Message: <blockquote data-quote="audioholic" data-source="post: 5694488" data-attributes="member: 549629">You can have dead space in a rectangular box, yes. Imagine a rectangular ported box with the mouth of the port at one end of the box (inside). If you mount the sub towards the same end as the internal port mouth, the sub may tend to pump air directly to/thru the port, rather than compress the entire internal volume of the enclosure and then force the air out/in.Another example of a dead space would be a large ported box with a relatively small and confined finger of space that doesn't fully compress like the rest of the box. Basically you are looking for uniform compression of the air inside the enclosure. Any space that does not compress uniformly with the rest of the box will be seen as a smaller space to the speaker, thus altering tuning.Hope this explains it better. Id draw some pics or google some, but Im lazy today.</blockquote>

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