Posted by Wayne Parham [ 65.214.102.163 ] on February 22, 2007 at 12:49:10:
In Reply to: Re: 1:1 throat area posted by DMoore on February 22, 2007 at 12:28:27:
Klipsch's rubber throat does that, you're right. But as you've said, it was done on undersized basshorns (smaller than 1/4λ) having compression and a front chamber. Might be useful on a smaller scale for a midhorn though, so I think it was worth noting. Good call.
The use of changing wall angle to increase uniformity of a constant directivity horn is a different matter, because it addresses the loss of pattern control. What CuppaJoe is talking about is widening a very small area near the throat. This will not widen or narrow the pattern at any frequency. It might cause a reflection at high frequency, hopefully, out of band. But the pattern would not be set by this feature because the rest of the wall angle constricts radiation to a narrower pattern.
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