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<blockquote data-quote="bladebarrier" data-source="post: 5189235" data-attributes="member: 603808">Ever open up a properly designed home speaker (not a DIY project) that&#039;s ported? This includes audiophile subs of all styles.I&#039;ll give you 10 to 1 odds that it has fill in it.Basically EVERY speaker with an open air driver should have some fill. Bandpass, sealed, ported, transmission line, etc.The concept of standing waves doesn&#039;t even apply to many common car audio speaker boxes as the waves are just too long for the enclosure size. This is why almost all car audio enclosures (and many subwoofers designed for the home) can be of almost any shape (assuming build quality and bracing isn&#039;t impacted).Standing waves are not why we fill sub enclosures, be they 2nd order or 4th order.A modest amount of fill is almost always beneficial, but the impact is often minor, and overdoing the fill will not improve things but make them worse.Whatever software you use to design your enclosure should allow you to include your fill amount, as well as leak amount. If it doesn&#039;t, do the math by hand, or in the case of a sealed box, experiment with fill levels after (re-tuning a ported box is also possible if the port is an easy to modify design, but may lead to far greater time consumption to tweak).</blockquote>

[QUOTE="bladebarrier, post: 5189235, member: 603808"] Ever open up a properly designed home speaker (not a DIY project) that's ported? This includes audiophile subs of all styles. I'll give you 10 to 1 odds that it has fill in it. Basically EVERY speaker with an open air driver should have some fill. Bandpass, sealed, ported, transmission line, etc. The concept of standing waves doesn't even apply to many common car audio speaker boxes as the waves are just too long for the enclosure size. This is why almost all car audio enclosures (and many subwoofers designed for the home) can be of almost any shape (assuming build quality and bracing isn't impacted). Standing waves are not why we fill sub enclosures, be they 2nd order or 4th order. A modest amount of fill is almost always beneficial, but the impact is often minor, and overdoing the fill will not improve things but make them worse. Whatever software you use to design your enclosure should allow you to include your fill amount, as well as leak amount. If it doesn't, do the math by hand, or in the case of a sealed box, experiment with fill levels after (re-tuning a ported box is also possible if the port is an easy to modify design, but may lead to far greater time consumption to tweak). [/QUOTE]

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