Simple passive audio summing

Discussion in 'The Projects Forum' started by guitarguy12387, Dec 20, 2009.

  1. guitarguy12387

    Thread Starter Active Member

    Apr 10, 2008
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    Hey everyone. I simply want to sum a balanced stereo signal to balanced mono. Not sure how best to go about it! Any tips? Thanks!
     
  2. DickCappels

    Moderator

    Aug 21, 2008
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    Assuming that you are talking about the audio input to an amplifier:
    Connect one 1k resistor to the right channel. Connect one 1k resistor to the left channel. Connect the other end of both resistors together and that is the mono output. All shields (grounds) are connected together.

    Or do you want to connect the outputs of two amplifiers to drive one speaker? (I don't know how to do that safely, but I'll bet somebody does).
     
    Last edited: Dec 21, 2009
  3. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    He´s talking about balanced signal. Probably he wants to keep it balanced
     
  4. guitarguy12387

    Thread Starter Active Member

    Apr 10, 2008
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    12
    Yes i am looking to keep it balanced. Could i just do this twice (i.e. sum the hot pins together then the cold)?

    What i want to do is more for mixing purposes than for an amplifier... simply, i want a button that i'll press that will sum a signal to mono. Sorry, shoulda been more clear.
     
  5. DickCappels

    Moderator

    Aug 21, 2008
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    That should work (two mixers instead of one). It only takes four resistors to try!
     
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