Re: Microphone Output Impedance
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Here is what?you asked.? - "Output Impedance" refers to the impedance between Pin 2 and ground on the microphone.
- "symmetrical Impedance" refers to the impedance between Pin 2 and Pin 3 on the microphone.
Here is what I think you?are?looking for: Output impedance?is a measure of the impedance between Pin 2 (and/or 3) to ground. You want this to be low, typically on a condenser mic it is 50 Ohms? Symmetrical?Impedance is really a term used in the Power Industry not audio. What you are referring?to is how close Pin 2 to ground and Pin 3 to ground match.?
This is important for having a balanced line to the mic preamp. It is more important that the impedance?match than the signal out of the mic. THere are mics that only have a signal on Pin 2 but Pin 3 matches the impedance of Pin 2. Thus any induced noise is canceled?out at the mic preamp.?
Jules
Hello, everyone.
I am someone who has been receiving a lot of help from this community.
Recently, I have been studying microphone output impedance.
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I noticed that there are various terms commonly used, such as "output impedance" and "symmetrical impedance."First of all, I am confused about the definitions of these terms.
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Can I assume that the two terms mean the same thing?
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From what I understand:
- "Output Impedance" refers to the impedance between Pin 2 and ground on the microphone.
- "symmetrical Impedance" refers to the impedance between Pin 2 and Pin 3 on the microphone.
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If that is correct, I would like to know whether the impedance values provided by manufacturers refer to output impedance or symmetrical impedance.
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Secondly, I have a question about the method for measuring impedance.
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From what I have studied, among the XLR pins (GND-1, HOT(+)-2, COLD(-)-3):
In the case of measuring condenser microphone impedance using voltage drop, should I connect the load RL between Pin 2 and Pin 3 to calculate the impedance?
Or should I connect separate loads RL between Pin 2 and ground, and Pin 3 and ground, to calculate the impedance? Which method is correct?
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Thank you for reading.
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I hope you all wrap up the year well!
-- Best Regards,
Jules Ryckebusch
214 399 0931
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