| Re: Subhornor bass horns only [message #18150 is a reply to message #18149] |
Mon, 26 September 2005 12:34   |
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Wayne Parham
Messages: 18774
Registered: January 2001
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Illuminati (33rd Degree) |
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The truth is, when a segment expands with a straight-sided expansion on one side and no expansion on the other, it is really a parabolic expansion, not conical. Conical expansion requires linear expansion in both axis. Exponential or hyperbolic requires even more. But by using several sections, you can approximate the flare you want, even with straight side walls. Also, there will be a notch in output at the frequency where the side wall distance is 1/4 wavelength, so consider this when choosing a crossover frequency. If it's a basshorn, it probably won't be an issue, and may help increase rolloff above the passband.
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