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Humming Sound I have a humming sound in my speakers when my receiver is on. I tried to ground it and move it through all the power outlets but it does not help. I only have the speakers connected and it makes that annoying sound. Please help.

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Re: Humming Sound - Audio & Video Receivers


Posted on May 21, 2008

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Why is there low humming in the receiver sub channel(only?)

Sounds like a shorted capacitor in the sub out circuit.

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How old is your HK receiver? The power supply capacitors can get old and tired, and cause the hum and shutoff. Repair is an option.

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I have an older model Harman Kardon AVR and have started hearing humming from the speakers that are attached to it. Is my receiver going bad or is there something else I need to do to fix this problem?

you may have a bad Earth power 110 V AC cable connection which makes such hum / buzz even nothing connected..
Check the connections between components and make sure they are secure before proceeding to the next Step. Sometimes, loose connections can cause a hum.
  • Separate the audio cables from the power cables; electromagnetic interference from the power cables can cause stereo hum. Use cable ties to secure the audio cables away from the power cables.
  • Plug in a surge protector to the outlet, and then plug all the components into that surge protector
  • Connect a ground plug to the surge protector and then plug the ground plug into the main outlet. A ground plug is available at any hardware store, and turns a three prong connection into a two prong. Ground plugs help eliminate 60 cycle hum.
  • 5 Connect the ground wire from your turntable to the ground wire connection on the receiver. If this doesn't work, looking on the back there should be a grounding point,

    Unplug your receiver.. Split a wire and attach one of the splits to the receiver where you will see the text, "ground" or something similar. Attach the other end to something metal such as a pipe that goes into the ground. Secure with electrical tape. Plug in.
    connect the ground wire to a screw on the electrical outlet.

    Read more: How to Fix a Hum on a Stereo Receiver '

    Take care and please remember to rate "AS THUMBS UP" Thanks
  • Jun 20, 2011 | Harman Kardon AVR 85

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    How do I stop the hum coming from my surround sound speakers

    You have a ground loop, most probably. Try grounding your receiver by running a copper wire to the screw on the electrical outlet.

    May 02, 2010 | Technics SA-AX540 Receiver

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    There is a humming noise coming out all speakers

    That is often a grounding problem. Try plugging it into a different outlet, or a power conditioning device.
    If that does not help, check that all inputs are properly connected...if a composite cable is not completely seated it can sometimes cause a humming sound.

    Dec 19, 2009 | Kenwood VR-407 Receiver

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    It making a humming sound and the clarity of the sound is destorted

    just look for bad capacitors or loose ground

    May 18, 2009 | Sunfire Ultimate Receiver

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    Humming sound(speakers)when HK AVR 3550 is powered up?

    yea try use in a monster power strip it clears al of that up it is picking up noise from all the wires

    Apr 02, 2009 | Harman Kardon HK 3550 Receiver

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    Humming sound (speakers)when HK AVR is powered up.

    In my case the buzz was only on front speakers. There are 3 capasitors (100uF/25V) very close to the cooling ribs of 3 regulators in the power supply. In my case the C922 was bad.

    Apr 02, 2009 | Harman Kardon AVR 500 Receiver

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    Denon AVR-1601 Receiver

    Check capacitors in power supply......also check for over-heated
    resistors..all 1 ohm.....replace if cooked...................T.

    Nov 21, 2007 | Denon AVR-1601 Receiver

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