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In the Forum: Horn-Loaded Speakers
In the Thread: Horn loaded ribbons and other Vasyachkin’s tangents....

Post Subject: Ribbon vertical responsePosted by Vasyachkin on: 11/3/2008

when you say conventional tweeters have 30 - 40 degrees - at which frequency is that ? probably not at 20 khz.

sure at some low enough frequency a ribbon in effect becomes a point source. but at higher frequencies it should become more and more directional.

at around 20 khz it seems as if the response should quickly fall off as you begin to move off-axis vertically ( as you move either above or below the top or bottom of the ribbon ).

i mean at some high enough frequency the ribbon should be launching a cylindrical wave front so if you're either above or below this cylinder your treble should be attenuated. and this cylinder may only be a few inches tall.

obviously depending on how much treble attenuation you're willing to accept you can say it has more or less dispersion but what if i don't want to accept ANY attenuation ? what if i want to have absolutely flat response at any angle ? i believe that with my configuration that is exactly how it would work.

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