Stewart Pinkerton wrote:

On Sat, 06 Nov 2004 00:52:27 -0800, Bob Cain
wrote:


William Sommerwerck wrote:


Orthodynamic speakers -- ie, a conductor on a flat plastic substrate.

What!???

They're fairly common. Several companies sell them, including one in Seattle.

Wierd that Googling "orthodynamic speaker" or "orthodynamic
loudspeaker" turns up nothing.


I get 37 hits - maybe you need a new ISP? :-)

Ah, I was searching on them as a phrase rather than as
either word appearing independantly. Looked at all 37 and
the word seems to be used a fair bit but not defined often.
Two sources indicated that orthodynamic and isodynamic are
a distinction based on how the force is applied. They both
say that orthodynamic is when it is applied to a single
point (or ring) and would encompass cone and dome speakers.
They say that isodynamic drivers are those that have their
whole surface driven and would encompass, electrostatics,
magnaplaner and ribbons.

The audiophile use is vice versa with orthodynamic meaning
surface driven.


Bob
--

"Things should be described as simply as possible, but no
simpler."

A. Einstein