If a cable tv input is part of your system, then the ground loop is usually caused by the ground of the cable system being at a different potential than the electrical ground (see page 115 of the current issue of Stereophile [June?]).
Remove the cable connection at the input. If the hum disappears, then go buy the MAGIC box or MAGIC Splitter.
(No, I do not work for MONDIAL, but I have spoken to Paul Rosenberg, who told me the above. And yes, my hum also was caused by the same thing. And it disappeared when I disconnected the cable connection.
Remove the cable connection at the input. If the hum disappears, then go buy the MAGIC box or MAGIC Splitter.
(No, I do not work for MONDIAL, but I have spoken to Paul Rosenberg, who told me the above. And yes, my hum also was caused by the same thing. And it disappeared when I disconnected the cable connection.