sorry toudou, i'm just checking my old reviews and i saw your question.
by interfaces, are you referring to the black discs joe provides to interface between the equipment feet and the CM platforms? yes, i'm using those. i can't say i've done an AB comparison with and without them though. i had been using walker valid points beneath my cdp and walker pucks on top of the cdp. i stopped using those when i went to the CM system.
in general, the CM direct coupling system is amazing. the break-in is long and bizarre, very much unlike tube break-in where improvements are more or less linear over time. after it had all settled in, the improvements were not subtle. my filarmonia plays louder and clearer. it sounds much "bigger" than before. my house sound with the CM system is more nuanced, energetic, realistic, and articulate. i wouldn't say it makes bad recordings sound better, but well mastered digital sounds MUCH better, no question.
by interfaces, are you referring to the black discs joe provides to interface between the equipment feet and the CM platforms? yes, i'm using those. i can't say i've done an AB comparison with and without them though. i had been using walker valid points beneath my cdp and walker pucks on top of the cdp. i stopped using those when i went to the CM system.
in general, the CM direct coupling system is amazing. the break-in is long and bizarre, very much unlike tube break-in where improvements are more or less linear over time. after it had all settled in, the improvements were not subtle. my filarmonia plays louder and clearer. it sounds much "bigger" than before. my house sound with the CM system is more nuanced, energetic, realistic, and articulate. i wouldn't say it makes bad recordings sound better, but well mastered digital sounds MUCH better, no question.