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  1. #1
    Member Cliff Rogers's Avatar
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    Aug 2019
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    Not entirely correct.
    Output to Input impedance matching is a subject not well understood.
    Below is a link to a page on microphone impedance that may help you understand if you want to plough through it.

    In a nutshell, low impedance output into high input works, high impedance output into low impedance input doesn’t.

    It has more to do with the signal level presented to the input than the impedance of the output.

    100K, 250K & 500K volume pots are better for matching small signals to a high impedance input than a lower value pot.

    Here are some links.
    https://mynewmicrophone.com/microphone-impedance/
    https://sound-au.com/project01.htm
    Cliff

  2. #2
    Mentor jugglindan's Avatar
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    Quote Originally Posted by Cliff Rogers View Post
    Not entirely correct.
    Output to Input impedance matching is a subject not well understood.
    Below is a link to a page on microphone impedance that may help you understand if you want to plough through it.

    In a nutshell, low impedance output into high input works, high impedance output into low impedance input doesn’t.

    It has more to do with the signal level presented to the input than the impedance of the output.

    100K, 250K & 500K volume pots are better for matching small signals to a high impedance input than a lower value pot.

    Here are some links.
    https://mynewmicrophone.com/microphone-impedance/
    https://sound-au.com/project01.htm
    Thanks Cliff. That's why I love these projects and this forum: they help me learn things

    I have used the sound-au pages for lots of other information, so I will start with that one.

    DC
    Mantra: No more pedals, must finish BlueyCaster...
    Disclaimer: I haven't done woodwork since high school, and wasn't really paying attention at the time ...

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