Kevin McMurtrie wrote:

If you had a perfect, zero ohm, superconducting speaker, the current
would be the force,
A superconducting speaker would be a dead short only if you stopped the
cone.

YOU SAID zero ohms!
THATS A DEAD SHORT!

Voltage does determine the speed, just as it does for a DC motor.

Voltage deteminines the speed for an electric motor because there
is MORE force to or from the permanent magnets...

NOT because higher voltage travels through a circuit faster!
High voltage or low voltage both have the current still have
the same speed through a circuit...

For instance, a far away radio signal thats STRONG doesnt arrive
ant faster than a far away rado signal thats WEAK....If that was
the case you would have something like the doppler effect when a
radio station fades.. And you dont...

There can be doppler effects in radio but not because a signal is
weaker or stronger...

The current is (Vin - Vback)/Ohms. The higher the input voltage, the
faster the cone must move to create back EMF to balance the equation.
The amount of back EMF created by motion depends on the winding size.

But were not talking about back EMF.... And back EMF doesnt
affect the SPEED of voltage anyway, only the amount of the voltage.

If you apply voltagoe to a circuit (like a speaker) and the motion of the
voice coil through the magnet created ITS OWN VOLTAGE, then thats
called back EMF... The added voltage adds to the original voltage and
changes the potential.

To see the back EMF with out the original voltage simply hook your volt meter
to your woofer speaker trminals (with the woof disconnected) and then
push doen the woofer cone, your meter will tell you that voltage is being
produced by the voice coil moving..

But of course, nothing to do with speed...

NOW, you may be confused, thinking about your electric motor, because
when a back emf is dcreated by the motors movement, that could change
and even reduce the original voltage, so that reduced voltage might make
your electric motor run slower, but it still has nothing to do with the speed
of the juice through the wire...

Of course we're getting theoretical here. 4 or 8 ohms is a lot of
resistance so speakers are far from perfect.

Alot??
I guess that depends on how you look at it...

Don't bring electrons into this. They move only a little faster than
grass grows.

nearly the speed of light!
IMO, thats quite a bit faster than grass grows...

Eddie Runner