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Speakers buzzing

I have buzzing problem with my speakers. I can get them to stop buzzing but I am not sure why it works. I think it is some type of interference but I am not exactly sure what. 

I have a Yamaha receiver in my detached garage with speakers wire running underground to my speakers in the yard.

I know my speakers are fine, I have tested elsewhere. My receiver is fine, I also tested elsewhere. One of the final things I tried was, leaving my receiver in the garage and run an extension cord to a different location speakers still buzz. I unplugged my garage door opener, all my chargers, extra refrigerator, florescent lights they still buzz. When I cut all power to my garage and plug into extension cord plugged in somewhere else they stopped buzzing. Turned the power in the garage the buzzing started again.

Is there anything I can do be able to keep the receiver in the garage or is it likely hopeless? 
faithers03
erik_squires
15,643 posts
 
It sounds like you are getting DC or noise on the line. Some light or other device's power supply is affecting the quality of the AC.

It is also possible your AC line to your garage is bad, like a bad neutral, corroded connection, etc. For this you'll need to have an electrician check it.
maxwave's avatar
maxwave
901 posts
 
Maybe  a power conditioner .
kalali's avatar
kalali
1,977 posts
 
Make sure you don't have any chargers for cordless hand tools plugged in the same circuit/outlet as the receiver. The transformers in those devices can interfere with audio equipment.  
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