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<blockquote data-quote="Immacomputer" data-source="post: 4963555" data-attributes="member: 570419">That &quot;rule of thumb&quot; is stupid and WRONG! All it does is cause confusion and spread around a myth that port area should be directly proportional to box volume. That is a huge misconception that can give good or bad results. Take this thread for example. This guy is all confused thinking he needs way more port area than he really does.To the OP: The differences in sound that you&#039;re describing is not from the port area but rather from a combination of the tuning frequency, drivers used, and the vehicle they&#039;re in. The port area just needs to be sufficient enough to not cause significant turbulence and to help match a certain tuning frequency with a given box volume.Many people use aero ports (circular ports with flares on them) to help reduce turbulence and allow for a much smaller port area than a slot port would require given everything else is equal. They&#039;re probably not as common because they&#039;re more expensive.</blockquote>

[QUOTE="Immacomputer, post: 4963555, member: 570419"] That "rule of thumb" is stupid and WRONG! All it does is cause confusion and spread around a myth that port area should be directly proportional to box volume. That is a huge misconception that can give good or bad results. Take this thread for example. This guy is all confused thinking he needs way more port area than he really does. To the OP: The differences in sound that you're describing is not from the port area but rather from a combination of the tuning frequency, drivers used, and the vehicle they're in. The port area just needs to be sufficient enough to not cause significant turbulence and to help match a certain tuning frequency with a given box volume. Many people use aero ports (circular ports with flares on them) to help reduce turbulence and allow for a much smaller port area than a slot port would require given everything else is equal. They're probably not as common because they're more expensive. [/QUOTE]

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