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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: Re: Thank you Tom, could have not said it better! posted by Bill Fitzmaurice on July 29, 2003 at 06:19:52:
Bill,I would have to disagree with you on the proper way to fold a horn. The simple physics of matter clearly demonstrates that folds along the diagonal are the best way for wide bandwidth. One good reference to this is on the second page of Bruce Edgar’s Monolith article. See it here: http://www.volvotreter.de/downloads/Edgar-Monolith-Horn-02.jpg
If we were to look at a fold that has a smooth curved radius bend, then basically you would be scattering the short high frequency waves all over the place. There would only be a small portion on the curved reflector that would actually direct the high frequencies down the horn. It is a proven fact that the angle of incidence is equal to the angle of reflection. John Sheerin’s “Acoustic Wavefront Mapping in Horn Bends†is yet another example that small or curved reflectors don’t work for high frequencies. It can be viewed here: http://ldsg.snippets.org/HORNS/waves.html
Don’t get me wrong, curved bends have their place. An ideal place to use them is in a sub horn or a back loaded horn where high frequency performance is not needed, or not wanted. At low frequencies the wave front behaves much like water in a fire hose, it just follows the hose to the path of least resistance. If you are getting response 2 and 3 octaves above the calculated mass roll off of the driver, then it is from some other factor that is not being accounted for. Could be cone breakup, cabinet resonance, uncalibrated measurement equipment, measurement environment, higher than usual directivity, etc…
One note: I’m not from New Guinea, and I am well aware of things that are possible and not possible. For instance, I can’t walk through walls, but who knows maybe if I saw you do it I might be able to do it too. No offense intended, just paraphrasing you.
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Follow Ups
- Disagree - JLH 16:42:27 07/29/03 (7)
- You've got it backwards. The opposite is true. - Bill Fitzmaurice 05:03:47 07/30/03 (0)
- Bends - John Sheerin 21:06:12 07/29/03 (5)
- Re: Bends - hancock 07:21:27 07/30/03 (4)
- Re: Bends - John Sheerin 12:57:53 07/30/03 (3)
- Very interesting - Bill Fitzmaurice 06:06:57 07/31/03 (2)
- Re: Very interesting - John Sheerin 08:00:08 07/31/03 (1)
- Re: Very interesting - Bill Fitzmaurice 08:39:34 07/31/03 (0)
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