Audio Pads

Discussion in 'The Projects Forum' started by Audio Tx, Nov 9, 2011.

  1. Audio Tx

    Thread Starter New Member

    Nov 9, 2011
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    Anybody here know how to make audio pads? -20dB, -50dB etc. I need to make some with XLR cables too attenuate mic level signal.


    Thanks
     
  2. bertus

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  3. Audio Tx

    Thread Starter New Member

    Nov 9, 2011
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    Great thanks for the websites. Do you know which pins of the XLR gets the resistors for the T pad?


    I assume

    pin1 R1 pin2
    pin1 R1 pin3
    ??? shunt ???
     
  4. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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  5. Audio Tx

    Thread Starter New Member

    Nov 9, 2011
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    Thanks for the link Kermit but I need to know which pins are represented on this diagram.



    [​IMG]
     
  6. bertus

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  7. Audio Tx

    Thread Starter New Member

    Nov 9, 2011
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    It's a balanced signal XLR to XLR Mostly to pad line level to mic level
     
  8. bertus

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    Hello,

    With the given calculator you can create the attenuation pad needed.
    What you need to know is the input impedance, output impedance and attenuation.
    For example input 600 Ω, output 10 kΩ, 20 dB will give you the following circuit:

    [​IMG]

    This page from the wiki shows you some theory behind the attenuation pads:
    http://en.wikipedia.org/wiki/Attenuator_(electronics)

    Bertus
     
    Last edited: Nov 11, 2011
  9. Audio Tx

    Thread Starter New Member

    Nov 9, 2011
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