Speaker Asylum

I didn't mean to ruffle your feathers

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DFaulds

(A)

In Reply to: Re: I don't think it has anything to do with the ribbons... posted by John A. Casler on October 14, 2005 at 07:41:35:

My appologies if you were offended, but statements like:
"VMPS will be announcing the BIGGEST development EVER!!!!!"
and
"This new technology is as close to the "Holy Grail" of speaker design as I can imagine."
Just lends itself to ridicule. And yes, as far as I know it's true it was only posted on Brian's forum, but once it hits the net it pretty much gets spread around. Isn't that why you place a sign in the company store in the first place -- to get press?
Just remember that headlines like this are usually reserved for really IMPORTANT audio advances like Mpingo disks and orange felt tip markers. And, of course, Gilmore Ribbon speakers.

Follow Ups:

Re: I didn't mean to ruffle your feathers - John A. Casler 11:25:29 10/14/05 (0)
Hi DFaulds,
No ruffled feathers from me, and my "wonderment" about the original poster was not aimed at you. Sorry if it seemed so.
The "Biggest Development" was meant as the Biggest Development in VMPS's technology, but no doubt, it is a "sought after goal of many if not most speaker designs.
My comments were simply regarding why there is such energy wasted on negative postings.
I can only surmise.
In any event, Brian has posted some information and I can only assume that it will be interesting and satisfying to some and more "negative fodder" for others.
Re: I didn't mean to ruffle your feathers - Brian Cheney 09:12:00 10/14/05 (10)
US Patent application filed 10/13/05, originally entitled:
"Planar Loudspeaker with Constant Directivity Full Range"
is now making its appearance at www.audiocircle.com. Click on the VMPS Forum.
The posts are long and spread out for maximum effect.
Instructions on "How to Flame This Invention" will be appended to the final posting.
Enjoy!
- I take it instead of an acoustic lens � la Beveridge, the planar-magnetic driver itself is shaped as such? - cfb 15:10:42 10/16/05 (2)
  Just a guess; the planar-magnetic membrane is shaped for wide dispersion (180 degrees maybe, horizontal and vertical?), inverted opposed triangles or such. Possibly something like the surface of an acoustic grating, something along the lines of an active RPG ;-)
  
  ... \/
  . |> <|
  ... /\
  
  sorry my ascii art is not up to par.
  - Re: I take it instead of an acoustic lens � la Beveridge, the planar-magnetic driver itself is shaped as such? - Brian Cheney 18:31:59 10/16/05 (1)
    The acoustic lens on the Beveridge was about 8" to 9" W and provided good directivity up to about 1500Hz. After that, beam city. I heard the 2SW about 20 years ago and liked it, but the store had them set up with the lenses facing the listener instead of each other.
    There are no trianglar CD shapes in my patent.
    - OK - wishing you success with the new line - NT. - cfb 18:40:59 10/16/05 (0)
      no text
- "Planar loudspeaker with constant directivity fullrange" - Duke 13:46:26 10/14/05 (0)
  I like the title! Without knowing any more than that, it sounds to me like Big Brian is barking up the right tree. Hype or not, I would agree that constant directivity is one of the holy grails.
  Now, just for the record, I think there are already at least two full-range planars out there that have essentially constant directivity. I sell one of them, and the other is the Beveridge electrostat, recently resurrected by Harold's son. In fact, several of the loudspeakers I sell have constant directivity (or at least constant directivity index) over an exceptionally large portion of the spectrum, using conventional drivers and somewhat unconventional loading techniques.
  I presume Brian is adapting a ribbon or planar-magnetic technology, which would have definite advantages in maximum output capability over the other CD-approximating planars I'm aware of.
  Duke
- Patent application number? - MAP_ 10:57:00 10/14/05 (4)
  Hi Brian,
  Number, please? You mentioned licensing possibilities. Apologies if I missed the number in another post somewhere.
  Best,
  MAP_
  - Re: Patent application number? - Brian Cheney 11:15:49 10/14/05 (3)
    Patent app number should be issued shortly and I will convey.
    Watch that AC thread, the worm is about to turn...
    - Re: Patent application number? - MAP_ 12:10:19 10/14/05 (2)
      Hi Brian,
      Thanks. And/or, the exact title. You seemed to hint that the title under which it was filed may have been different than the one you posted.
      Best,
      MAP_
      - Re: Patent application number? - Brian Cheney 13:25:42 10/14/05 (1)
        
        In Reply to: Re: Patent application number? posted by MAP_ on October 14, 2005 at 12:10:19:
        
        Yep, you're right. And the words "constant directivity" appear nowhere in the disclosure. While a patent app number is assigned by the Patent Office within a week, I am told to refer to the disclosure as "patent pending" rather than by application number, until the usual 18 months go by.
        
        Re: Patent application number? - MAP_ 14:29:26 10/14/05 (0)
        
        In Reply to: Re: Patent application number? posted by Brian Cheney on October 14, 2005 at 13:25:42:
        
        Thanks again, Brian. Please post when you know the number or PM me. Best - MAP_
- So far it's a great read Brian - DFaulds 09:20:41 10/14/05 (0)

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