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Original Message
RE: JBL 2441Throat Diameter
Posted by tomservo on March 1, 2017 at 13:57:24:
AS long as the step in size for increasing area is less than about 1/4 wavelength at the highest frequency of concern, the transition has no significant / measurable impact.
20KHz has a wl of about 5/8 inch fwiw.
Going down in size can act like a low pass or worse depending on how large it is.
Best,
Tom Danley
Danley Sound Labs