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-   -   Omnidirectional midrange driver - will it work? (http://www.diyaudio.com/forums/planars-exotics/110917-omnidirectional-midrange-driver-will-work.html)

el`Ol 29th October 2007 10:51 AM

Omnidirectional midrange driver - will it work?
 
2 Attachment(s)
Hello all!

Some time ago I had an idea for an omnidirctional midrange driver complementing a 4Pi-style 360° ribbon tweeter. The conductors are placed vertically, like ribbons, lying between neodymium blocks. The retracting force is maintained by the folds, similar to a conventional spider. The surround material across the folds prevents the air from being pressed out. The whole construction is held by the upper and lower surround.
But I ask myself:
The air gap is narrower than the one of a ribbon, but wider than in dynamic drivers. Is the moving mass to high to get it done with today`s magnet technology?

Oliver

tinitus 29th October 2007 12:32 PM

I believe that a T-shaped ribbon has been proved to work, also resulting in a narrow gap, but I am sure it has its own flaws too, one would be both flexibility and stability of the "ribbon", especially the the part in the gap could be suspect to instability, and the result could be high distortion

bear 18th November 2007 09:23 PM

How is the force being applied to the radiating surface?
(where's the "voice coil"?)

The materials used will determine the mass.

What maintains the curvature?
What is the distance between elements?

_-_-bear

el`Ol 19th November 2007 08:00 AM

The conductors ("Leiterbahn") are placed in the edges of the folds, between the magnets, extending vertically. The force is applied to the surface by the V-shaped folds. The curvature has to be maintained by the cylinder itself, maybe aluminium, that´s why I have doubts about Mms.
Diameter is 12cm or so.


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