In Reply to: pi horns theory posted by Observator on September 19, 2001 at 13:28:30:
All large format bass horns have certain similarities, and most are very similar to mine. Most approximate a Salmon shape flare using a series of conical or parabolic sections. I suggest modeling any horn you're interested in with Hornresp, which is available at the bottom of the page at the Pi Speakers website.
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