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Hum and Buzz Ground Loop

Behringer Truth B2031A Studio monitors always produce a humm and buzz when switched on. How do we prevent noisy monitors?

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Best way is with balanced audio lines. Use either XLR or TRS cables IF your devices have those connections.

Also, do NOT use light dimmers as these are often a source of the higher frequencies that cause buzz.

Also power ALL the interconnected audio devices from a single source outlet rrather than from mulltiple building receptacles.

Posted on Jul 28, 2009

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1 Answer

Behringer Truth B2031A major hum in both monitors


Could be when the power outage the speaker was blown a little. If not check the wire connections.

Sep 10, 2013 | Audio & Video Receivers

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My nad 3020 is making a buzzing noise when i connect to peakers even when nothing else is connected to it. any solutions ?


Hi,
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 ' eHow.com http://www.ehow.com/how_5183193_fix-hum-stereo-receiver.html#ixzz1PpFHs1Mv


    Take care and please remember to rate "AS THUMBS UP" Thanks

    Jun 20, 2011 | NAD Audio & Video Receivers

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    I have a Boston Acoustics VR-500 Subwoofer with a problem. As soon as anything is plugged into the line level RCA jacks, the subwoofer produces a loud buzz/hum. I have tried connecting it to the subwoofer...


    I'm thinking you have an open shield ground on the RCA input side. Connecting speaker inputs possibly restores the ground. Try connecting the high level inputs then disconnect the remote end of the cables (floating the grounds).

    Then get out an ohmmeter and find that open circuitor or bad solder joint between RCA ground and real ground in the speaker's amplifier. Or.... if speaker ground kills the hum and you want to use RCA Line Level input to the sub, just connect one minus speaker output on your source amp to one minus on the sub's amp.

    Mar 01, 2011 | Audio & Video Receivers

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    Behringer Truth B2031A powered monitor speaker - radio interference in left speaker


    A well know problem to the Behringer Truth B2031A speakers is radio interference and noise. I had the same problem with mine and found a solution on a forum!

    If you open the speakers, you'll see a cable from the main board that runs to the 2 lights at the front (on/limit LED's). It functions as an antenna... Disconnect it and your speakers are silent, finally. (OK no leds, but I can live with that).

    Oct 24, 2010 | Audio & Video Receivers

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    AVR-4800 - After 30 min audio goes out all channels just hum/buzz


    if it is under warrantee then fix it.
    sounds like a component is over heating, probably cost couple hundred (or more) to fix it, balance that with what you paid.

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    Turntable buzz / ground loop problem


    Hi!

    I'm not sure what you are asking. The ground loop is specifically intended to reduce or eliminate buzz/hum from the turntable. If the ground loop is in place and connected as per the instructions with your turntable/receiver, these noises should not be an issue in a modern system. I would make sure that your connection is solid and at a good ground point (easy to check if you have an ohm-meter/multi-meter (which comes in handy for many things and can be had very inexpensively). If the wire is broken, it can be replaced with any wire of the same or heavier gauge.

    If I've failed to understand your problem, please post more detail and I will try again. If not, please let me know if this is helpful. Good luck with your problem.

    Bob

    Oct 09, 2008 | Audio & Video Receivers

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    I have a Denon AVC 3030. In pro logic mode it makes a rumbling through my right and left speakers. During quiet parts of movies it is quite annoying. I know it's old but I really like it.


    If what you mean is a low humming sound when the volume is turned down to minimum level, this is usually from power supply filtering problems. Most of the time this is from the electrolytic filter capacitors going out of spec with age and use, and or voltage retulation problems.

    If the sound is quiet with the volume turned down, and the hum or buzz increases with the increase of the volume control, this is usualy due to a ground loop problem between the associated equipment connected to the amplifier, or a bad interconnect cable.


    Jerry G.

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    My guess would be +and -12v supply to preamp opamps has ripple. (drycaps or bad solder). I may be able to get you a pdf service manual if needed. kstahl65@att.net

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    One speaker buzz when cold


    It works fine for a couple of minutes the starts to hum. If you turn up the volume it masks the noise but is till audible, also the video switching cuts out. after examining the components I have seen some heat discoloration in the power suply area and believe it to be power for the video board. disconecting the ribbon cable form the video board the hum goes away, and so does any video wich does'nt matter for me because my monitor1.gif does all the HD video1.gif switching. hope this may help with some noise problems.

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    Buzzing from speakers


    sounds like a capacitor is taking a long time to do it's job. You might want to see how much it would cost to repair.

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