Rerurn to Romy the Cat's Site
In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.
Post Subject: Transition ZonePosted by Paul S on: 6/26/2010
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Thinking of the transition from round to triangular, I go back to Jessie's fibrated "plaster" for the round profile section. To make the transition, make the narrow end of the triangle "too long", and somewhat larger inside than need be, to serve as a "transition zone". Then, leave the wider end of the round section unfinished, with the "fibers" still hanging out. You could then pull and fasten the pieces together according to horn length, pull the loose fibers into the horn and work from inside the horn to fill the inside of the "too long triangular section" until the round profile is a correct continuation of the initial flair, according to your template. The material you use for the round section would need to be more "plastic" in the generic sense than normal concrete or plaster of Paris, to preclude subsequent cracking; there are a number of materials presently available, that would fill the bill. This idea would necessarily put the transition zone at a point with a section large enough (and close enough to the big end) to get to it with hands and tools, to work it from the inside.
Best regards,
Paul SRerurn to Romy the Cat's Site