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In Reply to: RE: Horn Tweeters vs Bullet Tweeters posted by b.l.zeebub on July 29, 2014 at 05:56:43
>'I suspect the main difference will be that bullets tend to have a very narrow dispersion compared to some other horn tweeters'
They do have the same pattern on the vertical and horizontal axis, which may or may not be appropriate for a given application.
Follow Ups:
What I meant is that bullets have a 40deg conical dispersion while other compression tweeters usually have a much wider dispersion like 100x60 or even 140x40 for the slot-loaded ones.
(Data from Beyma for three tweeters using the same motor assembly but different horns/loading.)
> What I meant is that bullets have a 40deg...dispersion
Some do, but not all. For instance,these are 80 degrees:
http://www.parts-express.com/eminence-apt-80-super-tweeter-with-80-degree-conical-horn--290-532
http://www.parts-express.com/pedocs/specs/294-580-bc-speakers-de35-specifications-45777.pdf
Like all horns the angle of dispersion can be tweaked with changes in the horn geometry.
I'm not familiar with those.
The ones I'm familiar with are those made by JBL, Beyma and FaitalPro which all have 40 deg conical dispersion.
Anyway since I do not know all available bullets I used the phrase 'tend to' in my first post.
The so called bullet,,,do not have a phase plug,,,If you slice the socalled bullet in half,,, you will see that is is a circular HORN some call it a ring radiater but it is a true horn,,,My JBL 075 has a dispersion of 90 degrees
I used to have 2402s which have a dispersion of 40deg.
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