High Efficiency Speaker Asylum: Re: Low pressure family. by Paul Eizik Need speakers that can rock with just one watt? You found da place.

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Posted by Paul Eizik (A ) on April 17, 2003 at 23:20:31

In Reply to: Re: On Dinsdale on Horns. (long) posted by larry moore on April 17, 2003 at 11:40:12:

Hi Larry

The only hi-fi variation on the low pressure side of the horn family which I am familiar with is Tom Danley's Unity Horn, which uses a conical horn with multiple drivers in the horn walls and one in the throat. I've also heard str8arrow's D.I.Y. version. The overall sound of these horns is more toward the sound of the direct radiator, in other words not as dynamic and focused as a compression driver, but also quite smooth generally. In a horn the pressure factor only becomes a problem in a P.A. application where you are pushing 120 dB continous, and is not much to worry about in the home. If you look at Dinsdale's graphs, most of the pressure distortion in a horn is 2nd harmonic (the octave), and this is the same distortion that the solid state delegation and the scope jockeys had warned us was so evil in S.E.T. amplifiers. For me, the ultimate midrange is the tractrix horn loaded compression driver, and the entire rest of the audio system should be reverse engineered from this. Just my opinion you understand. Most of us are familiar with the parabolic horn in a re-entrant configuration, typically in an industrial paging system, but if the conical horn can sound good, the parabolic must have hi-fi potential too. How did your horn work out?

Paul

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