60Hz Hum coming from speakers when power adapter is plugged in?

Discussion in 'MacBook Pro' started by RaptorJesus, Jul 28, 2008.

  1. RaptorJesus macrumors newbie

    RaptorJesus

    Joined:
    Jul 14, 2008
    #1
    I bought a set of speakers for my MBP today (Logitech X 240 3.1)

    And Ive noticed that when the power adapter is plugged into the computer, a 60Hz hum comes from the speakers. Playing music covers this hum up pretty well though. The second I unplug the power cord the hum goes away. I have tried different combinations of hooking one up a power strip and the other directly to a wall outlet thinking that might help.

    Its nothing catastrophic, but has anyone else had a similar problem? If so what have you done to remedy the situation?
     
  2. alphaod macrumors Core

    alphaod

    Joined:
    Feb 9, 2008
    Location:
    NYC
    #2
    You need to use the optical out and an external soundcard with a filter to clean the sound up.
     
  3. Sun Baked macrumors G5

    Sun Baked

    Joined:
    May 19, 2002
  4. nephilim7 macrumors regular

    Joined:
    Jun 13, 2008
    #4
    it's not an apple problem, it's a ground loop problem. Try the 3 prong plug in, if that doesn't fix it make sure everything that connects to the computer goes through one circuit.
     

Share This Page