Posted by Wayne Parham [ 65.69.120.152 ] on September 26, 2005 at 13:34:35:
In Reply to: Subhornor bass horns only posted by Adavis464 on September 26, 2005 at 09:04:37:
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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