It seems fairly clear that EMI/RFI from the PSU of the MC200 is polluting the 861. Dropping the noise coming out of the MC200 (by whatever means, over ethernet or mains) decreases the noise in the 861.
The question of how that noise manages to get into the 861 is both the least and most interesting one.
Least because it shouldn't be happening and most because it is happening.


Mark
G68, baby Genelecs, Humax Foxsat, Oppo+Vanity93, Toshiba HD-A35, Pioneer CLD-925 + Meridian 519, various other random bits and bobs
Got a black G08.2 you want to sell?