Kind of fits in with Meridians thinking concerning network cabling, with magnetic isolation on the ID41, and using ferrites on SpeakerLink in the Anniversary set up.

Shame he didn't switch off memory on the MC200 to see if the difference was core related.

Mind you, isn't this the guy who can hear which socket in a block in being used for the source? Nothing wrong with that though...

Lots of tinkering to do then!