Posted by Wayne Parham [ 65.69.121.141 ] on October 13, 2004 at 21:06:28:
In Reply to: Corner pi speakers posted by Waxahachie on October 13, 2004 at 18:40:04:
That's a good question, thanks for asking. And Tightwad is right that it has been discussed here a lot. It has been discussed enough that search results for "cornerhorn" bring back a pretty long list of posts. So it isn't surprising that Tightwad couldn't find the exact discussion he was thinking about. But here are a few of my favorites:
To summarize, I'd pretty much agree with Tightwad's description of the π cornerhorn. Technically speaking, the expansion of a room from the apex of a corner forms a conical horn with the same area expansion rate as a 70o rectangular horn up until the ceiling junction, where the expansion becomes parabolic. The motor chamber is vented, so you could say that it is a large conical horn with a vented rear-chamber.
I think the advantages are pretty obvious. The cabinet is much easier to build and service, and resonances caused by the wood and chambers formed by it are avoided. The lower vocal throatiness you'll hear on some cornerhorn designs is not present in the π cornerhorn. Also, since the midrange and tweeter horns have 90o horizontal dispersion, there is no midrange wall slap because the pattern is contained within. Horizontal dispersion of all sound sources matches, so sound distribution through the entire listening area is uniform.
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