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Dynamic microphones in regular soundcards

Discussion in 'Electronic Basics' started by Error_404, Nov 25, 2003.

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  1. Error_404

    Error_404 Guest

    Hey, i've got an audigy2 soundcard in my computer, and someone told me
    that i can't use my dynamic mic straight in to the microphone port on
    account of a 3V DC bias that'd cause problems with dynamic mics but is
    needed for condensors. now, keeping in mind i have no idea what he's
    talking about, is there any ways to fix this?
     
  2. Alan Smithee

    Alan Smithee Guest

    It's just a regular jack socket on an audigy isn't it?

    I use dynamic mics in my phantom powered (48V) mixing desk - no damage to
    the desk or mic

    At 3V, you ain't gonna do any damage to your mic.
     
  3. Bob Masta

    Bob Masta Guest


    Check the Mic connector on the sound card by plugging a normal
    stereo plug into it and measuring the voltages. Usually, the mic
    element is connected between the tip and the body, and the bias
    voltage is on the ring. If so, then you can make a simple adaptor
    for your dynamic mic that avoids the ring. This actually happens
    "automatically" if the mic plug is a mono-type, since it just shorts
    out the bias. The bias comes through a resistor on the card
    and shouldn't mind being shorted. So if you have a mono plug
    on your mic, you may want to just go ahead and use it.



    Bob Masta
    dqatechATdaqartaDOTcom

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
     
  4. Check these out:
    http://www.epanorama.net/circuits/microphone_powering.html


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