master / slave digital cable for 440Pro

[hardcore]

as I am this user I can also answer your question :>)
I started with a normal Cinch to AES connection, then added the groundlift which was a good improvement.
As I had the ifi SPDIF iPurifier2 already I tried it in a Cinch to Cinch connection which was the worst sounding connection before.
With the ifi the improvement is similar to the ground lift but more of it. I think that the re-clocking makes only a small part of this improvement, but the ifi adds a galvanic isolation.
The sound center was always shifted to the master, most with cinch, less with AES, even less with grtoundlift.
Now with the ifi the center is exactly between the speaker, deeper soundstage, simply better SQ. More details on the slave side.

Fascinating. Just to clarify - you mean you tried using the ifi SPDIF iPurifier2 in the Master-Companion connection, and it works? Was this RCA-RCA or RCA-XLR?

I've wondered if it would work since the protocol used in the Master-Companion connection is proprietary.