Ground Loop. Funny, i jsut spoke about those on another thread.
Everything must go to the same ground point. Find one outlet, put a high quality outlet strip on it, plug into that. Need to get somewhere else, get a logn, heavy extension cord.
Grounding not only causes hum, which we all hear, but all sorts of subtle distortions which no one ever seems to appreciate, but destroys good sound.
On my on designs i typically allow each chassis to either float or be grounded. Both ways have safety grounds, but one way eliminates a potential loop.
G
Everything must go to the same ground point. Find one outlet, put a high quality outlet strip on it, plug into that. Need to get somewhere else, get a logn, heavy extension cord.
Grounding not only causes hum, which we all hear, but all sorts of subtle distortions which no one ever seems to appreciate, but destroys good sound.
On my on designs i typically allow each chassis to either float or be grounded. Both ways have safety grounds, but one way eliminates a potential loop.
G