What Silenced the Ground Loop?


I have a ground loop in my system that is audible from the speakers as the volume is turned up higher. I have a Blue Circle integrated, and one of my sources is a Raysonic CD128. I've had the Raysonic connected single ended. I purchased an inexpensive XLR interconnect just to hear the sonic difference since my Blue Circle has balanced cd inputs and the Raysonic has xlr outputs (not truly balanced).

Once I connected the xlr cables between the Blue Circle int and the Raysonic, the ground loop is gone. Total silence. I can turn the volume on the integrated all the way up and the speakers are silent.

What is it about connecting via balanced inputs on my integrated to not truly balanced outputs on the cdp that killed the ground loop? Thanks for your thoughts
foster_9

Showing 1 response by newbee

All hums are not from ground loops. That you hum varies with volume suggests to me that it is not a 'ground loop' hum. Your RCA's output connections themselves may be causing a hum, or the tubes in the center two positions may be inducing a hum. Don't have that trouble with mine from either outputs though. FWIW.