So I ended up using the Concero as a USB to coax converter instead of as a DAC. I am feeding a Theta Chroma 396 which is what 15, 20 years old... Its old! like me... Anyways... on its own it sounds ok. A lot of smearing, probably a lot of jitter. Well the Concero takes the Theta up to a modern day level. I cant upsample, so its kind of a NOS DAC. Crisp. Clear. Great texture and really nice cymbals. Bass has always been a strong suit of the 396 and now there is a lot more detail in the bass vs the Theta alone. This combo id definitely better than the Concero alone, which has more air, is more neutral, and has more perceived treble, but isnt bright. It just wasnt my cup of tea. But in the end worked out well. Not that I wont be looking to update tomorrow.. lol