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  • 2 Post By basskingdave
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Why can't I get rid of humming noise

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Old 10-19-2013, 03:58 PM   #1  
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Default Why can't I get rid of humming noise

Hello, this is my 1st post on here but I have been reading many posts over the years. i recently purchased a new system that I cannot figure out so I am throwing my problem out there to see if anyone can help.

Receiver: Pioneer VSX-822k.

Speakers: Paradigm Cinema 70ct (includes sub, centre speaker and 4 satellites).

With this hooked up to a Samsung plasma TV, cable box, Samsung blurry (all through HDMI) I keep hearing a constant humming sound. It does not go away no matter what i do. Everything is plugged into a power bar which has surge and ground protection. I have tried:
- unplugging cable box and bluray so only speakers, amp and tv are on.
- plugging in different components to other outlets
- ensuring speaker wire is NOT touching power cords
- re-plugging and unplugging each speaker wire

Everything I have tried does not stop the humming. With everything on, when i move the amp to ensure wires are all connected, the amp will occasionally "Overheat" and turn itself off. No idea what causes this.

If anyone has any suggestions or ideas I am all ears. I cannot include links to the specs for both as I have not had 5 posts on there. I am not sure how to tell if they are actually compatible together, even though the salesman said it would be fine. Someone also told me its probably the actual power coming into my house being "dirty".
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Old 10-20-2013, 04:24 PM   #2  
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You didn't mention unplugging and turning the TV off while everything else is on?? Plasmas can radiate interference so try that. If you still have the hum, try unplugging everything (turn them off also) but your Pioneer, and see if you have the hum. If so, it's probably your Pioneer. If not, plug in things one-at-a-time until the hum returns so you can identify the culprit.

Very unlikely it's "dirty power" though it might be a grounding issue.
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Old 10-20-2013, 06:51 PM   #3  
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The fact that you mention overheating sounds like grounding short.
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Old 10-21-2013, 04:53 AM   #4  
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if.you have a three.prong.to two prong adapter.you may try that. It can isolate a ground loop issue but it sounds like a ground issue.
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Old 01-23-2020, 02:05 PM   #5  
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sounds like to me you need to rebuild the power supply. Many times the electrolytic capacitors fail, bulge and cause this humming. Open up your unit and check the electrolytic caps on the power supply board to see any obvious signs that the caps are bulging out on the top.
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Old 01-24-2020, 08:39 AM   #6  
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Quote:
Originally Posted by basskingdave View Post
sounds like to me you need to rebuild the power supply. Many times the electrolytic capacitors fail, bulge and cause this humming. Open up your unit and check the electrolytic caps on the power supply board to see any obvious signs that the caps are bulging out on the top.
That was my first thought.
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Old 01-24-2020, 10:47 AM   #7  
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Did someone turn on Mr. Peabody's Way-back machine? If so it looks to be a ground loop in the audio system, they make ground loop isolator's for this type of problem.
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