Also ATC hda-el2 looks a lot like xuelin ihifi 780 https://www.atc-lifestyle.com/product/audio/hda-el2/ Already bit the hook of 790 :)

Puled the trigger for the mk II. A.K.A. "The transporter" for my new stack :)

Z1 is dead silent at any volume level. My Z2 has a white noise background audible with sensitive earbuds (low impedance) or paused at high volume. Is it normal or did I get a dud?

My Z2 arrived today. Out of the box better sound than Z1, but at high volume is noiser also some random "pops". After a few ours of burn in no more "pops", better layering and better spatiality than Z1.

Koss KSC75+Walnut v2 is really a hard drug :) They really do sound fantastic to me :) 

After more hours of burn in, noises as amp are gone. :) In a couple of weeks will be mod time :)

Even touching the walnut makes noise (using as amp, as dap no noise)

My nut arrived yesterday. After initial burn in very good rendering of music texture Goldberg's Variations gave me goosebumps!! As an amp very sensitive to EMI. Very good pairing with Monk+ and Superlux HD668B

Waiting for mine from CKLewis. :)

Ibasso & Lurker0 thanks both for all of your work. Will try it tomorrow.