How do I connect XLR microphone directly into Layla 20 balanced input?

Discussion in 'Pro Audio' started by Krick, Oct 21, 2003.

  1. Krick

    Krick Guest

    I have a musician friend who wants to take the ouput from his
    microphone (XLR) and feed it into a Layla 20 sound card with the least
    amount of added electronics possible as he's trying to avoid coloring
    the sound.

    The microphone is XLR and requires phantom power.

    The Layla 20 has 1/4 inch balanced (or unbalanced, if desired) inputs.

    Is there some sort of "box" that will do what he wants?

    ....
    Krick
     
    Krick, Oct 21, 2003
    #1
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  2. A microphone preamp.

    Try http://groups.google.com with "mic pre" as the limiter for some of the
    thousands of discussions on this topic.

    -jw
     
    John Washburn, Oct 21, 2003
    #2
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  3. Tie pins 2 and 3 of the mic to a good 48V DC supply through 6.8k resistors.
    The resistors should be matched to 1% or better. Then AC couple the mic
    outputs to your converter inputs using between 1 and 10uF.
    You may need to add protection diodes to the converter input to prevent the
    coupling caps from discharging into the input when the mic is connected.
    Otherwise you must be very careful to ramp up/down the 48V slowly (seconds)
    before plugging/unplugging the mic.
     
    Bruno Putzeys, Oct 23, 2003
    #3
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