Acoustic Zen MC2 110 ohm?

I’ve gone through the same issue as you, and think I finally understand why you ask that question.  It seems that the AES cable spec is the default spec statement for the MC2 as a product line. That has a 110 ohm standard and so that’s why you see the MC2 as having 110 ohm.  But you’re safe to assume that the coax version is the coax standard 75. At least I really hope so.  

I'm here to correct my answer from last year in case someone comes across this thread.  I emailed Acoustic Zen and they confirmed that the MC2 cables, even with the RCA termination, are 110 ohm.  They are not 75 ohm.  Both of my DACs (a Holo May and a Schiit Yggy) require/recommend a 75-ohm cable, hmmmm. 

I’ve been using a 1m MC2 with RCAs and it sounds excellent in all respects, so if the 110 Ohm rating is impacting the sound I certainly don’t hear anything negative. I emailed AZ about this but never got a response, which was a bit disappointing. I’ve looked a little online and the answers were mixed as to whether this is an issue or not. All I know is the MC2 was a huge step up in performance across the board from both my Apogee Wyde Eye and Stereovox XV2 (descendant of the Kimber Illuminations D60) cables that are both considered to be pretty decent so I was very surprised at the absolute level of improvement it provided. Maybe someone more knowledgeable about digital cables here might have some thoughts on this?