Quite a few Bricasti M21 DACs for sale cheap

@tvad I have the M12 not a M21. Not customized just wanted to have BOTH a LAN & IS2 port available so I can switch back and forth between streaming and the M19. We also had another unit updated for a good customer here as well. 

@sksos, I edited my post to correct M21 to M12. Your clarification is duly noted.

If having both LAN and i2S inputs is not standard, and an additional input was added by machining the rear plate and adding an i2S card, then I consider this customization. You might consider it upgrading. I think it’s semantics. The take-away is it’s possible for a fee.

Had this been offered when I updated my M1 SE to M1 Series 2 a year ago, then I would have done it.

The mothership just called me back to tell me that there is a new MDX board. $800. Unclear as to whether or not it's user installed. 

Looking to go from M3 to M1S2. I don’t think I care for the new blue display and on top of it I just turn all of the displays off anyway. 
Did Joe mention any sonic improvements with the new MDX board?

@audphile1,

I also installed the Bricasti MDx upgrade board in my Bricasti M21. My system sounds clearer, smoother, more engaging with more musical details. I like it very much and also highly recommend the MDx board upgrade.

Please read the instructions carefully since it requires you disconnect some cables, remove the old board and install the new board. I had someone help me and the job took about 45 minutes (we moved very slowly).