On Jun 20, 7:07 pm, More_Flaps wrote:
On Jun 20, 5:52 pm, "Ken S. Tucker" wrote:



Where Electro-Mechanical control of air is concerned,
we've all used a potentiometer to change the volume of
our speaker system...for about 100 years.
You may regard a speaker as an exceptionally finely
controlled servo/solenoid and is pretty damn reliable
and cheap.

A normal speaker is certainly NOT a servo system.
Get the basic ideas straight and you may begin to understnd the
problem.

Cheers

See solenoid + electromagnetic speaker, yawn
It's simple for me.
Ken