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Old 14th July 2012, 06:08 PM   #21
Remlab is offline Remlab  United States
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Julian Bunn's speaker with some measurements..
https://plus.google.com/photos/10115...121?banner=pwa

Last edited by Remlab; 14th July 2012 at 06:15 PM.
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Old 14th July 2012, 06:23 PM   #22
SY is offline SY  United States
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OK, those give most of the answer, thanks for the link. Efficiency measurements would complete the picture.
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Old 14th July 2012, 08:08 PM   #23
planot is offline planot  United States
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Default Other measurements

Quote:
Originally Posted by Remlab View Post
Planot
I could be wrong, but wouldn't there be very complex modal resonances off all sorts? Torsional, parametric, longitudinal etc with very serious decay/ringing problems? Could we see some other measurements too if you have them?
All driver designs have weaknesses and strengths. When I started building prototypes I ignored all of the potential issues that would cause my theories to fail.

Loudspeakers are ultimately about listening. The Planot driver sounds great; even my limited prototypes.

The only measurements I have disclosed are those on my Web site. The most skeptical engineers will never believe any measurements done by me. So, I am concentrating on producing more and better prototypes to take to RMAF and for reviewers as well as labs to evaluate.

My second prototype, P2, was tested by an independent, not for profit, testing laboratory to prove my basic claims of functionality. These test results as well as raw data are available to qualified manufacturers.

Please refer to my Web site for "data" about my products.

Thanks,
John
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Old 14th July 2012, 08:26 PM   #24
Remlab is offline Remlab  United States
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What is your opinion of Bunn's attempt? Is it lacking in any way?

Last edited by Remlab; 14th July 2012 at 08:29 PM.
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Old 14th July 2012, 10:34 PM   #25
planot is offline planot  United States
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Dr. Bunn was just proving the concept. There was no stabilization at the top and no centering/dampening mechanism. Both are critical!

I could have released a video of P4 playing but that would prove nothing to the skeptics.
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Old 14th July 2012, 10:59 PM   #26
Pano is offline Pano  United States
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Nooooo.... but it might have intrigued those of us who are curious about the technology.
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Old 14th July 2012, 11:11 PM   #27
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Pay the fee and sign the NDA and then maybe you can watch it.
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Old 14th July 2012, 11:16 PM   #28
Remlab is offline Remlab  United States
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Quote:
Originally Posted by planot View Post
All driver designs have weaknesses and strengths. When I started building prototypes I ignored all of the potential issues that would cause my theories to fail.

Loudspeakers are ultimately about listening. The Planot driver sounds great; even my limited prototypes.

The only measurements I have disclosed are those on my Web site. The most skeptical engineers will never believe any measurements done by me. So, I am concentrating on producing more and better prototypes to take to RMAF and for reviewers as well as labs to evaluate.

My second prototype, P2, was tested by an independent, not for profit, testing laboratory to prove my basic claims of functionality. These test results as well as raw data are available to qualified manufacturers.

Please refer to my Web site for "data" about my products.

Thanks,
John
Loudspeaker measurements show that the reproducer is not in itself a musical instrument. Or an amusical instrument for that matter..
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Old 14th July 2012, 11:20 PM   #29
Pano is offline Pano  United States
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If John wants to hide the details of his invention from the prying eyes of the entire world, that's fine by me. I've signed NDA's that were far less interesting. It is nice that he wants to make it available to the DIY crowd. How often do you get to build a speaker that is really different?
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Old 15th July 2012, 01:28 AM   #30
jlsem is offline jlsem  United States
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Man, Chicago is an audio-happenin' town.

Planot® Speaker public demos of Planot technology.

John
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