Ball shaped tweeters: any success?

Wavebourn · 8th June 2011, 10:09 PM

In German magazine funkschau 22 1956 was description of some ball-shaped tweeter. According to the article, tests of such omni-directional speaker was promising, but I have not seen anything real.

Does anybody have any information?

Andrew Eckhardt · 8th June 2011, 10:20 PM

Are footballs acceptable? I heard they sound very nice.

mbl 101 X-treme - MBL of America

Charles Darwin · 8th June 2011, 11:23 PM

Given that we haven't seen that many of them over the last 57 years I assume they were not that much of a success.

Looking at the drawing I don't think it would have been truly omni-directional.
Horizontally it certainly covers 360deg but vertically it would appear while the equator expands pole-to-pole shrinks. This would limit vertical dispersion to around 90deg I'd guess.

Ron E · 8th June 2011, 11:42 PM

worth trying, but a bit hard to make. Not sure how you would make something that would increase in diameter when driven from one side. Gives me an idea, though.

lduarte1973 · 8th June 2011, 11:48 PM

Quote:

Originally Posted by Andrew Eckhardt

Are footballs acceptable? I heard they sound very nice.

mbl 101 X-treme - MBL of America

too cheap for me

and what about a circular ribbon ?

Wavebourn · 9th June 2011, 12:07 AM

Quote:

Originally Posted by Ron E

worth trying, but a bit hard to make. Not sure how you would make something that would increase in diameter when driven from one side. Gives me an idea, though.

It was cut vertically, several gaps.

8th June 2011, 11:42 PM	#4
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	worth trying, but a bit hard to make. Not sure how you would make something that would increase in diameter when driven from one side. Gives me an idea, though. __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan

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8th June 2011, 10:20 PM	#2
Andrew Eckhardt diyAudio Member Join Date: Nov 2005 Location: PA	Are footballs acceptable? I heard they sound very nice. mbl 101 X-treme - MBL of America

8th June 2011, 11:23 PM	#3
Charles Darwin diyAudio Member Join Date: Nov 2009 Location: Birmingham, UK	Given that we haven't seen that many of them over the last 57 years I assume they were not that much of a success. Looking at the drawing I don't think it would have been truly omni-directional. Horizontally it certainly covers 360deg but vertically it would appear while the equator expands pole-to-pole shrinks. This would limit vertical dispersion to around 90deg I'd guess.

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