Just ordered Muse MK2, I'll post the results when I receive it... It seems that there is obvious difference in comparison with MK1:     It looks like that design is somewhat different from Aune too, since Aune has some regulator connected with wires to PCB near supply connector.

Actually I have that combo and I think it sounds pretty nicier than stock ne5532 which came on my model. However, I'm thinking of upgrading to D2X for a simple reason... Since I have GTX 580 it sends a lot of garbage to the signal(not PSU related, tried several ones, now on CM Silent Pro...

So, still no info where to buy this? IT looks like it's not homemade.