Sorry for sounding ignorant, but how would you choose between using the uDAC-2's volume pot vs. your headphone amp's volume pot? I'm currently feeding the uDAC-2 to an M-Stage via the RCA out jacks. I originally thought that the uDAC-2's RCA output was straight line out, but I noticed that the volume knob does indeed change the RCA output volume.
Also, does anyone know which Sabre chip is being used in the uDAC-2? I've looked all over their website, but I can't seem to find the specs. Maybe I'm just missing an obvious link...
I'm sorry, but you already own a uDAC-2 and your asking someone else's opinion. I'd recommend that you try using your own ears. Try using it both ways and decide for yourself, it's your own opinion that matters.