Thank you for your response, Jerry.

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Based on the methods you provided, I will proceed to experiment with impedance measurement.

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The experimental setup is as follows:Speaker (Sine wave Signal Source)→ Mic → DI Box (high-precision potentiometer) → Audio AnalyzerThe DI box is equipped with a high-precision potentiometer, which will be connected as a variable resistor

between pins 2 and 3 of the XLR connection from the microphone.

Subsequently, it will be connected to the audio analyzer via an XLR cable.

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The speaker emits sine wave signals at frequencies such as 100Hz, 200Hz, 400Hz, 1000Hz, 2000Hz, and 10000Hz.Initially, the sound pressure level (SPL) at each frequency is measured without connecting the DI box.Afterward, the DI box is connected, and the resistance value that results in a -6dB drop from the reference SPL at each frequency is identified and measured.

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At this point, the resistance value corresponding to -6dB is considered the impedance value for measurement purposes.

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Another method is to rent the MR-PRO device from NTi Audio.
According to the NTi Audio website, this device is also used for measuring speaker impedance. (However, I anticipate that renting the device might be somewhat difficult...)It would be great to conduct measurements and derive results.

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Thanks Jerry,
Best Ragards,

Kandoit7