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Ohms resistance can be measured with a meter if you know the correct connector pins to use. If it is a powered microphone, such as one with a battery, you need to remove the battery to avoid damage to the ohm meter. ...more...Ohms resistance can be measured with a meter if you know the correct connector pins to use. If it is a powered microphone, such as one with a battery, you need to remove the battery to avoid damage to the ohm meter. ...more... This is not conclusive as pins 7 and 8 are open until the mic PTT is pressed. When pressed the resistance is measured at around 175 ohms. This is a 9 pin microphone where pins 7 and 8 are the last two on the left side before the notch. So how does a 300 ohm microphone measure at 175 ohms on the meter?