So I got a chance to spend some time with the DA8 yesterday. I removed the Audiophilleo AP1 + PurePower from the chain and connected my Auraliti PK90 server directly to the DA8 via USB. I was able to successfully play several different DSD tracks without issue. I tried DXD and it didn't work right, but I've had that issue before so I suspect it might be an issue with the PK90 rather than the DA8.
Anyway, playing really high quality PCM and DSD tracks through the DA8, then out to a Stax SRA-12S powering an SR-007mkII, the result was phenomenal. I used my favorite DSD track of all time - Eric Bibb "Where the Green Grass Grows". Dang. The DA8 handles it extremely well. It's "Hi-Fi" without sounding forced in the least. Very natural, with a sense of ease to it, like it isn't even trying hard.
Next I tried some plain old PCM tracks, classics like Tears in Heaven and Comfortably Numb and even Hotel California (yuck, not again). Despite its easy going nature, the DA8 really digs an amazing amount of detail out of these redbook tracks. So in that sense it isn't quite as laid back as the D18. At the same time, it's not as forward and detail oriented overall as the Anedio D2 or Violectric V800, and definitely less so than the Firestone Audio Tobby.
After that, I realized my description of the DA8 was lining up closely with my description of the Matrix X-Sabre. I moved some things around in my rack and got them both connected to my SRA-12S for easy switching back and forth. But that's where I ran into trouble - I intended to run the DA8 straight from my Auraliti server, and the X-Sabre from a laptop over USB. But as I grabbed the laptop I realized the battery was dead. Oops! I have another laptop but it's got drivers loaded for a different DAC and I don't like to install more than one at a time, so I couldn't use that. Discouraged, and running out of time, I quite for the night. But I'll be back for more soon!