We took delivery of the new K-03 and K-01 a little over 3 weeks ago. I believe we were one of the first if not the very first in the US to get them in.
As with the K-03, the K-01 has many digital filter and upconversion options which can be selected including defeating the digital filter and upconversion altogether. The player may also be used with it's built in volume control to drive the amplifiers directly. Each mode does require proper burn in before evaluation.
To date I have about 450 hours on the K-01 running nearly 24 hrs/day and it is breaking in nicely. While I will reserve comments and comparisons until I reach a point when I feel they are no longer improving, I will go on the record and state that this player is simply spectacular and has a sound quality that I have not experienced before from solid state digital.
Additionally, I have just begun listening with the G-0rb rubidium clock strapped on. Wow!! :)
Disclaimer: Esoteric dealer