Canon GL1 Audio problems

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    • #60599
      AvatarHabibrobert
      Participant

       

      Hello,
       
      I am trying to use an XLR mic with a Cannon GL1. The min input  on the camera is a 1/8 inch input. I tried using a XLR to 1/4 inch to 1/8 inch adaptors (3 adaptors total) to get the mic work but I did not have any luck. I even ran the mic off of its phantom power and still had no luck. I know that the mic input does work because I tried using a regular 1/8 inch mic on it and it worked. Has anyone had this issue before? Any ideas on what I should do?
       
      Many Thanks
    • #207387
      Avatargldnears
      Member

      You probably need an isolation transformer between the mic ( under its own power ) and the first adapter in your chain. Truely " Phantom " power involves sending a positive voltage to the mic on pins 2 and 3, with the coresponding negative applied to pin 1. Adapting an XLR connection down to 1/8" involves shorting either pin 2 or pin 3 to the ground ( shield ) pin 1, thus " unbalancing " the mic's signal, and in the process, shorting out the Phentom power to the mic. Inserting an isolation transformer BEFORE pins 2 or 3 get connected to ground will assure that the mic will get the power it needs.   Rick Crampton

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