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Ground loop hum

My technics turntable developed a ground loop hum when I got a new preamp Rogue RP7 and power amp Aesthetix Atlas.  I had a ground wire connected to the turntable and grounded it to each, one after the other when the first had no effect. Neither did the second grounding. It has been suggested I ground it to both at the same time which I haven’t tried yet. Any other suggestions?  I am running the system from two dedicated 20 amp lines. Running Vandersteen Quatro wood ct speakers.  Thanks in advance. 

kavakat1

Showing 1 response by erik_squires

erik_squires
16,844 posts
 

I’m late here.  First try moving everything to the same outlet.  This will ensure your "ground loop" isn’t really imbalanced voltages causing imbalanced center tapped ground differences. 

Unplug anything metallic besides your audio.  Ethernet is OK, but coax is not, and USB is not. 

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