"Denny B" wrote in message
...
Is it possible to measure Impedance with an ohm meter.
For example can you measure the Impedance of a 4 ohm
car speaker with an ohm meter?

When I tell people they cannot measure Impedance with an
ohm meter, you need an impedance meter and the impedance
must be measured with the speaker in operation, with a signal generator
supplying a fixed frequency, this always leads to disagreements
with the person who demands an ohm meter to measure what he calls
Impedance, when I tell him an ohm meter can only measure the resistance
of the coil there is always disagreement.

I tell them Impedance is AC resistance and what they measure
with an ohm meter is DC resistance. Disagreement here again.

Will somebody take me up on this and clarify the situation.

Thanks in advance
Denny B




yes denny you are correct, further loudspeakers have a changing impedance
with frequency so an impedance meter for this use will have a few spot
frequencies built in to it.

a D.C ohm meter is traditionally used to do a quick and dirty check of
loudspeaker drive units however, mainly because an impedance meter is a
costly item, especially for infrequent use.
regards bob