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Gosh, I'm sorry..

Posted by RCA-fan (M) on August 10, 2008 at 15:48:23

In Reply to: RE: I believe Accoustic Horn co. (AH) has an eliptical horn available. posted by JoshK on August 9, 2008 at 18:56:00:

Well, cast aluminum is labor intensive.
Aluminum, especially aluminum alloy is expensive. The R&D time is expensive. It took a long time how to learn to design this stuff.

You might be better off thinking of designing a product if you were to consider the nature of fundamental product design.
It is hard to come up with a new piece of music, a novel, a trademark, a design for a chair etc.
You might ask what the designer of the iPod was paid. Probably a "stupid expensive" amount of money , but people buy the iPods over all the cheap ones—because they are a joy to use. And they work

Also you are incorrect about needing a roll back on a radial horn.
In a radial horn( not elliptical) the mouth reflections are minimized.
If you do it right, the vertical dispersion is the same as the horizontal to about 8kHz.
As always, if you have test results , I am always interested to see them.

Also an elliptical horn. Let alone a tractrix elliptical horn, is not the best shape. I have built these, and run complete tests. ( out of fiberglass- my throw-away acoustic models are always done in glass)
If you look more carefully, note the shape is not elliptical.

But, If you like the plastic stuff go for it.
You can always get next years model, and the one after that.

Richard Heyser said it took me 10 years to learn how to do it, and 10 minutes to explain it


Sigh. Bill

PS I posted about the elliptical horn you are referring to...
http://db.audioasylum.com/cgi/m.mpl?forum=hug&n=125767&highlight=elliptical+RCA-fan&r=&session=

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