Question Buzzing noise from speakers

Discussion in 'AV Receivers & Amplifiers' started by Slider09, Sep 8, 2017.

  1. Slider09

    Slider09
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    Hi all

    I have a very annoying buzzing coming from all speakers which are connected to my receiver.
    I've gone through the usual checks of:

    1) Disconnecting each input in turn - buzzing noise still present
    2) Disconnecting ALL inputs - buzzing noise still present
    3) Disconnecting ALL inputs AND turning power off everything else in the room, leaving only the receiver powered up - buzzing noise still present

    The buzzing has got worse after moving all the equipment in my living room.

    Any other ideas?

    Thanks
     
  2. MIKEVO

    MIKEVO
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    It is possible an item plugged into the mains could cause the receiver to Hum.

    Have you added Dimmer switches, Neon lights, Plug in Power Supplies since the move?
    Remove items in turn.

    Try the original power socket you used before the move round.

    You generally will get a small amount of hum or hiss from speakers, but once you tune in to it, it becomes hard to ignore. I presume you are getting 50Hz mains hum and the volume is the same from all speakers?
     
  3. Slider09

    Slider09
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    Volume is the same from all speakers. Also, increasing / decreasing the volume of the receiver does not affect the volume of the buzz.

    I have removed all other devices from the ring main apart from the receiver and the buzz is still there.
     
  4. Rodders53

    Rodders53
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    What is in room(s) on adjacent wall(s) of the receiver? {or even above and below} It may be proximity to something in another room or circuit running past close to the AVR.

    BUT Try powering off ALL circuits in the home except the ring main feeding the AVR to see if the buzz stops? If it does, then power up circuits one at a time to find the culprit?
     
  5. JH4

    JH4
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    Is the Amp earthed correctly ? That would be my first thought. Does it change if you touch the metal casing ? Also, have you got a phono input that's not earthed ?
     
    Last edited: Sep 8, 2017

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