[Chris Hornbeck]

On Tue, 22 Jul 2008 00:39:38 -0400, "Soundhaspriority"
wrote:

There seems to be an association in my head like this, because the ribbon so
naturally lends itself to symmetrical construction.

Just to be contrary (and as a loudspeaker guy), ribbons
are very difficult to make because the magnets want to
sit in their "null plane", so interfere with that plane.
They don't easily scale down to sitting in the "fore-'n-aft"
plane.

And electrostatics, scaled up big (visible spacing dimensions)
are easiest to make when symmetrical. Go figure.


And:

I'm hoping that those who understand it better will comment
further about the 90 degree phase shift. This is sometimes
described as a mass limited response, but these seem (to my
poor understanding) mutually contradictory.

IOW: a ribbon's working range is designed to be above its
fundamental (massXcompliance) resonance. A "condenser"s
working range is designed to be below its fundamental resonance.
Or course these are only applicable to the stereotypes,
a velocity-sensitive dynamic and a pressure-sensitive
electrostatic.

So, why is one "90 degrees", but not the other?


Much thanks, as always,
Chris Hornbeck