As I understand it the issue is how AC mains leakage current flows between boxes. With unbalanced the leakage current goes through the shield which is the voltage reference for the "hot" conductor, thus the noise generated from the leakage current is directly added to the signal. With a balanced connection the shield is NOT used as the voltage reference for the signal so any noise generated by the leakage current flowing between boxes does not add to the signal.
Note that this does NOT need galvanic isolation (such as from an audio transformer) it just arises because neither of the conductors used for carrying the signal are directly connected to ground such as IS the case for unbalanced. John S. -- JohnSwenson ------------------------------------------------------------------------ JohnSwenson's Profile: http://forums.slimdevices.com/member.php?userid=5974 View this thread: http://forums.slimdevices.com/showthread.php?t=82122 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
