Speakers Connected to PC are Humming

Discussion in 'Home Theater PCs' started by Rick Shepherd, Jun 20, 2014.

  1. Rick Shepherd

    Rick Shepherd Stunt Coordinator

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    Yes, I know it's an oldie but goodie.Speaker/Headphone outputs (both front and back) on PC connected to AVR or Amp produces discernible hum through the speakers. Cable is 3,5mm to RCA.All devices are on the same power circuit and I have thrown a ground loop isolator in there for good measure.Little AC powered computer speakers don't have this problem.PC also has HDMI output which is fine.Any words of wisdom?
     
  2. schan1269

    schan1269 HTF Expert
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    Is your 3.5/RCA shielded?
     
  3. Rick Shepherd

    Rick Shepherd Stunt Coordinator

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    I have just now used a 3.5mm to RCA adapator and run a well-shielded component video cable (2 out of the 3) and speakers connected to the old amp are now hissing, not humming, but the speakers connected to the AVR are good as gold. Problem solved - just need to check up on the amp.
     

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