Audio Pad/Attenuator

Discussion in 'General Electronics Chat' started by frenchie29, Apr 10, 2011.

  1. frenchie29

    Thread Starter Active Member

    Nov 28, 2008
    134
    0
    I have to go from a 3.5mm connector (iPhone) to a XLR female What kind of pad would I need to build and which pins of the XLR connector will require resistors??? It has to go from line level to mic level.


    http://www.nu9n.com/tpad-calculator.html

    Would that make sense

    R1 588ohms
    R3 588ohms
    shunt R2 12ohms
     
    Last edited: Apr 10, 2011
  2. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    Do you know the output impedance of the iPhone?
    Do you know the input impedance of the microphone input?

    Most times the XRL plugs are used for balanced inputs:
    http://www.clarkwire.com/PinOutXLRBalanced.htm

    A simple attenuator will not make a correct match.

    Bertus
     
  3. frenchie29

    Thread Starter Active Member

    Nov 28, 2008
    134
    0
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