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In Reply to: RE: Here you go posted by JBen on July 11, 2017 at 10:11:26
I am sorry that my reply was a little condensed. The explanation was put together over a few years of research into audiology papers and a few audio papers and lots of conjecture that was later confirmed by bat cat and rat audiology studies. I assembled the explanation over a couple of years of argument on other forums and emails and took some 500 discussion posts. I created a fuller more coherent explanation that fills out 3 pages but am waiting for more documentation to close it. So I tried to condense it into as short an explanation as I could.
If you want me to expand on any point then I can do so.
Follow Ups:
No need for an apology, on the contrary. I was actually surprised that someone was able to cover the key points so well and briefly for such a complex matter. It delivered the goods just fine. Kudos! And thank you.
Moving on to (lighter) related subjects, Aceinc mentioned that the shape and side openings on the M-T-M enclose were meant to play a role. It may not be obvious in my pictures but the upper enclosure is not really rectangular.
I need to ask him to elaborate on this but, perhaps you've seen this approach before? I have not, but then again, neither have I found Neo's in M-T-M configs.
Thanks.
Re openings in the "wings" are a practice from other dipole speaker makers including Genesis Nola and Legacy. Though I don't know how these are designed to do their jobs but that they are there for sustaining the dipole null and its contribution to the acoustic roll off and the positive effect on clarity due to the elimination of the air spring behind a thin diaphragm driver by those vents.
I should point out that Janszen ESLs do incorporate an air spring in their ESL designs where the panels are loaded by an enclosure. They extol the lower distortion this produces vs. open baffle ESLs but are criticized for slightly lesser detail and clarity compared to dipole ESLs.
Similarly, VMPS loaded their planar drivers with an enclosure in all but one design for the same reason and have a bit less clarity and detail because of this - my observation.
Finally, the Neo3 tweeters have far less distortion with a closed cup, but lose some of their "magic" when applied this way, vs. dipole operation.
LOL, as soon as I saw "Nola", I remembered the side openings on the Nola Baby Grand Reference I heard a few years ago, though they are fully rectangular.
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