Amplifier PLOP/POP SOUND

Discussion in 'General Electronics Chat' started by @android, May 24, 2012.

  1. @android

    Thread Starter Member

    Dec 15, 2011
    178
    9
    What causes plop sound in amplifiers? Means turning ON/OFF discharges some noise signal through speakers. What is the root?
    How can we avoid it? Or reduce it?
     
  2. nigelwright7557

    Senior Member

    May 10, 2008
    487
    71
    It can be casued by the mains being switched. Putting a small capacitor across the switch can help.
    Also the amplifier simply powering up can make a pop until the voltages become stable.
     
  3. #12

    Expert

    Nov 30, 2010
    16,355
    6,853
    Finding the exact answer requires a complete schematic, and then some communication.
     
  4. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    Half-decent amplifiers use a relay that connects the speaker only when the amplifier is powered-up and is stable.
     
  5. @android

    Thread Starter Member

    Dec 15, 2011
    178
    9
    Yes. But how does switching of mains cause this noise?? I'm still not clear on that.
     
  6. @android

    Thread Starter Member

    Dec 15, 2011
    178
    9
    I don't want to find SOLUTION for a system. I need your knowledge on this topic. I figured solution to reduce it. By simply putting mute mechanism at pre-amp stage. Still don't know how & what causes that discharge in to speakers! :confused:
     
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