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hello Jerry,

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thanks to your reply.

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There seems to be a difference between Jules' response and yours.

Could you explain it in a way that is easier to understand?

I believe Jules mad esome kind of mental typo.

Jules explained that the impedance is between Pin 2 (or Pin 3) and ground.

On the other hand, you mentioned that it is "parasitic" and almost never specified.

I maintain this.

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In that case, does the impedance value specified by microphone manufacturers refer to the impedance between Pin 2 and Pin 3?

In all cases, yes.

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Additionally, assuming I have all the necessary equipment for measurement, could you explain how to measure the impedance of a condenser microphone?

There are several ways.

The best is using an impedance analyzer, but I doubt you have one handy, so you can resort to the -6dB loading.

You need to generate a constant acoustic level and measure the output level of the microphone (via a suitable preamp),? then load the mic with a resistor. When the level drops by 6dB, the resistor is equal to the combined impedance of the mic and the preamp.

Since a good preamp is supposed to have a larger impedance than the mic, we usually make the simplification of neglecting it.
So the generic method is to consider the mic impedance is eaqual to the resistor that produces 6dB attenuation.
Neglecting the role of the preamp impedance results in a 10-20% error.
Anyway, the actual impedance of a mic varies with frequency. If you want to measure that, you need to measure at several discrete frequencies, or use an impedance analyzer.
The problem is that impedance analyzers do not provide phantom power, so a separate phantom power supply must be added to the set-up, and it's parasitic impedance (typically 13.6 kohms) must be taken into account.

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Let me know if you need further assistance!

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Best Regards,

kandoit7