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Hum in speakers

Hello all

I am trying to set up a modest audio system and cant figure out why there is a hum when I turn the volume up past 55. It only happens when there is vinyl spinning. If I turn volume up without vinyl on there is no hum. Below 55 volume the hum is not there.

note: I did set the speaker impendence to 6 ohm via the receiver settings. 

Set up is:

 - Sony STRDH190 2-ch stereo Receiver

 - Warfedale Denton 80 Speakers (16 g speaker wire)

- Technics SL-1500C Turntable 

 

 

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Showing 2 responses by newbee

newbee
4,751 posts
 

You haven't routed your RCA from TT to phono stage near a transformer or other power source have you? That will create hum everytime (almost anyway). 

newbee
4,751 posts
 

I think I didn’t ask a clear question, so I’ll be a bit more specific by illustrating an experience I had. I had a wall wart (12v transformer) plugged into an extension cord lying on the floor behind my components. I had a cable from my pre-amp to my amp which was very close to the wall wart = hum. Moved the wart, end of problem. Components have internal transformers as well and if an RCA cable passes too close it can create a hum. It’s not just a matter of where your components are plugged into a wall. FWIW.

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