You can get about 30Hz from a 3meter folded horn...
Absolutely correct
http://redspade-audio.blogspot.com.au/2016/02/30-hz-horn-sub-continues.html
You can get about 30Hz from a 3meter folded horn...
Imo, directivity < 400 Hz or so is overrated.
Sure, a quarter wavelength gives you an output, but it isnt a true CD. Also I dont think anyone was specifically referncing folded horns. While it had similarities, it really isnt the point. True CD horns can have phase that other speakers cannot.
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