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Low Earth Orbit
DIY Audio
Port Holes on Horn Walls
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<blockquote data-quote="Peter Morris" data-source="post: 214735" data-attributes="member: 652"><p>I don’t think it’s a good idea to horn load a coaxial driver that way. The HF will bounce of the walls of the horn. The only way to get that to work is like what Danley does with their SM80 where the horn profile is more or less an extension of the speaker cone profile.</p><p></p><p>Yes it is possible to put port holes in the horn, but putting a large hole near the throat is not a good idea. What Danley (again) do in their synergy horns is put a small hole near the throat, its space at less than ¼ of a wave length relative to the crossover points so that the HF and MID can sum nicely without issues e.g. reflections from the base of the horn. As Chris said these are not bass ports, but inlets for the sound coming off the cone.</p><p></p><p>An example of a LF reflex port hole in a horn is Communities SLS920 (HF horn) and TW audio T24N (mid horn).</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 214735, member: 652"] I don’t think it’s a good idea to horn load a coaxial driver that way. The HF will bounce of the walls of the horn. The only way to get that to work is like what Danley does with their SM80 where the horn profile is more or less an extension of the speaker cone profile. Yes it is possible to put port holes in the horn, but putting a large hole near the throat is not a good idea. What Danley (again) do in their synergy horns is put a small hole near the throat, its space at less than ¼ of a wave length relative to the crossover points so that the HF and MID can sum nicely without issues e.g. reflections from the base of the horn. As Chris said these are not bass ports, but inlets for the sound coming off the cone. An example of a LF reflex port hole in a horn is Communities SLS920 (HF horn) and TW audio T24N (mid horn). [/QUOTE]
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