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12.5 foot folded horn in a smallish box?
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<blockquote data-quote="Art Welter" data-source="post: 57491" data-attributes="member: 52"><p>Re: 12.5 foot folded horn in a smallish box?</p><p></p><p></p><p>Most tapped horns have a path length of about 1/4 the length of the LF corner frequency, 12.5 feet looks a bit long for the XS-21 Chimera 18" Bass Horn considering the F3 of 36 Hz.</p><p></p><p>As far as being a "clone", it is a different shape than any present Danley TH, so is not a copy. Patents for cabinets with fold patterns with the speaker out similar to what Tom's TH look like have been granted as far back as the 1950's.</p><p></p><p>The fold pattern below of DIY er Xoc1 is similar to the DSL TH-18 (and is the exact exterior size), about 9.75' path length. </p><p>By making the first folds thinner getting a 12.5' path length would be possible, though the sensitivity would take a big hit as the F3 would drop to around 23 Hz with that long of a path.</p><p></p><p>Art</p></blockquote><p></p>
[QUOTE="Art Welter, post: 57491, member: 52"] Re: 12.5 foot folded horn in a smallish box? Most tapped horns have a path length of about 1/4 the length of the LF corner frequency, 12.5 feet looks a bit long for the XS-21 Chimera 18" Bass Horn considering the F3 of 36 Hz. As far as being a "clone", it is a different shape than any present Danley TH, so is not a copy. Patents for cabinets with fold patterns with the speaker out similar to what Tom's TH look like have been granted as far back as the 1950's. The fold pattern below of DIY er Xoc1 is similar to the DSL TH-18 (and is the exact exterior size), about 9.75' path length. By making the first folds thinner getting a 12.5' path length would be possible, though the sensitivity would take a big hit as the F3 would drop to around 23 Hz with that long of a path. Art [/QUOTE]
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