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<blockquote data-quote="Buck" data-source="post: 8869822" data-attributes="member: 591582"><p>It&#039;s just a tapped horn.&nbsp; It&#039;s done to create multiple tunings, with the sub tapped into the line, due to the way that changes phasing interactions in the line between front and rear waves, and there&#039;s the distance the front wave has to travel through the line seemingly in both directions.&nbsp; All of that adds different resonances vs just having a simple t line where the sub fires directly into the environment.&nbsp; I think it can be explained extremely complicated, and I haven&#039;t gotten deep enough into designing horns to share any examples I have of them.&nbsp; It also causes more overall pressure in the line, where the &quot;front&quot; wave of the sub creates more pressure in the line than it would firing out into the environment, because there&#039;s less room for the energy to escape from around the cone of the sub over the same time period due to it being enclosed, which can allow more power to be used before the woofer unloads, possibly allow for higher overall peak pressure like a bandpass can have over a ported box.&nbsp; That&#039;s my whole point is tapping a line and doing a compounding/series bandpass have similarities.&nbsp; Idk, there&#039;s a lot of explaining always to this stuff.&nbsp; I&#039;m not trained in it, just learned myself.</p></blockquote><p></p>

[QUOTE="Buck, post: 8869822, member: 591582"] It's just a tapped horn. It's done to create multiple tunings, with the sub tapped into the line, due to the way that changes phasing interactions in the line between front and rear waves, and there's the distance the front wave has to travel through the line seemingly in both directions. All of that adds different resonances vs just having a simple t line where the sub fires directly into the environment. I think it can be explained extremely complicated, and I haven't gotten deep enough into designing horns to share any examples I have of them. It also causes more overall pressure in the line, where the "front" wave of the sub creates more pressure in the line than it would firing out into the environment, because there's less room for the energy to escape from around the cone of the sub over the same time period due to it being enclosed, which can allow more power to be used before the woofer unloads, possibly allow for higher overall peak pressure like a bandpass can have over a ported box. That's my whole point is tapping a line and doing a compounding/series bandpass have similarities. Idk, there's a lot of explaining always to this stuff. I'm not trained in it, just learned myself. [/QUOTE]

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