Cancelation of ground loop noise.

I've had luck with my Wyred4Sound DAC2 and Integra DHC 80.3 with both my Boulder 1010 and previously with a McIntosh C2300. What I did was run a common wire from the ground terminal's intended for phono on the Integra and the preamp and the chasis of the DAC2. This resolved 90 percent of the humm noise I had. Oddly plugging everything into a McIntosh MPC1500 did absolutely nothing to resolve the issue. I found it odd since the MPC1500 is essentially a large isolation transformer. The last 10% was only obtained by using a cheater on the DAC. If I remove the ground wire between all the units, I get the humm back.

Ground loops suck.
 
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