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Junior Varsity
Low ceiling, long room - delays or louder PA?
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<blockquote data-quote="Art Welter" data-source="post: 100796" data-attributes="member: 52"><p>Re: Low ceiling, long room - delays or louder PA?</p><p></p><p></p><p>Sounds like your installation job there is pretty much done, so the rest is academic :^).</p><p></p><p>A 25 x 25 degree coverage would work for a standing audience, but may require a center down fill for seated audiences.</p><p>The diagram below shows a 22.5 degree pattern (90 degree paper folded twice, cheap protractor).</p><p></p><p>But as Ivan wrote: "The thing that many people forget-is that the sound does not stop at the rated pattern-at any freq", so it is not like the sound "turns off" in that area outside the 25 degrees. So the front rows are -10 dB in the HF instead of -6 dB, it's too loud up there anyway...</p><p>The SH-25 has a large mouth, so it has control to a fairly low frequency, a small narrow horn (as in most two way top speakers) will diffract (and go wide) at a higher frequency.</p><p></p><p>There is a lack of narrow dispersion products for 300 capacity Junior Varsity level rooms because they actually would require high rigging and an understanding of how to properly aim the cabinets, which seemingly seldom happens at that level.</p><p></p><p>A wide dispersion speaker like you aimed in a minute is a lot more forgiving of alignment errors.</p></blockquote><p></p>
[QUOTE="Art Welter, post: 100796, member: 52"] Re: Low ceiling, long room - delays or louder PA? Sounds like your installation job there is pretty much done, so the rest is academic :^). A 25 x 25 degree coverage would work for a standing audience, but may require a center down fill for seated audiences. The diagram below shows a 22.5 degree pattern (90 degree paper folded twice, cheap protractor). But as Ivan wrote: "The thing that many people forget-is that the sound does not stop at the rated pattern-at any freq", so it is not like the sound "turns off" in that area outside the 25 degrees. So the front rows are -10 dB in the HF instead of -6 dB, it's too loud up there anyway... The SH-25 has a large mouth, so it has control to a fairly low frequency, a small narrow horn (as in most two way top speakers) will diffract (and go wide) at a higher frequency. There is a lack of narrow dispersion products for 300 capacity Junior Varsity level rooms because they actually would require high rigging and an understanding of how to properly aim the cabinets, which seemingly seldom happens at that level. A wide dispersion speaker like you aimed in a minute is a lot more forgiving of alignment errors. [/QUOTE]
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Low ceiling, long room - delays or louder PA?
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