Hi VPN. I did this comparison in my listening room. I owned the MSB Diamond DAC IV+, fetmo clock, diamond supply, UMT+, USB card, streaming capable. I first compared the Diamond DAC V with fetmo clock, upgraded USB, Diamond supply. I could not hear a difference. I had a friend visit and he could not tell any difference either. The upgrade was expensive so I did not upgrade. Next, I compared the CH Precision C1, D1, X1, A1 in my room with the same speakers, Wilson Alexia. The electronics with the MSB were the ARC Ref Anniversary and Ref 210s with KT120s. The CH Precision won easily playing SACDs from the drive, USB input, ethernet streaming. The CH Precision system is more open, more real, "faster". As I've said before, CH Precision system is better together A1, L1, C1/D1. Adding X1s makes it even better. Those were my findings.