FWIW, I replaced a perfectly good class d purifi eigentakt amp (NAD M33) with the CSiB v2 and there is no comparison. The M33 was accurate and polite/boring. Overall, the sonics were, to pick a word, subdued. (Of course the pretty poor BlueSound streamer module and the ESS DAC implementation may have been more to blame.)
On the whole, I’d echo @audphile1 ’s description, and with much more grip, drive and life-like sound than the M33. Ultimately, however, with my other equipment and speakers, though I felt like it wasn’t giving enough warmth and flesh on the bones. In a couple weeks, #OP, if you can wait that long and don’t mind that it’s V2 (250 wpc with Class A for the first 12), TMR will have a pristine, 6-month old black model on their site. I am sorry to part with it because it is beautifully made, but just not the right device for me/my room.

