So far comparing the stack to my ODAC/SA-31 combo is that the stack is definitely on the airy, clean side. No addition of warmth anywhere. Its just very clean. Makes the HE400 sound nicely balanced and airy, compared to the warmer, fuller SA-31. This is a very short impression. So far the stack has less bass, and more sparkle, though A-GD amps are warm/smoother up top by design.
I dont have the O2, but I will be comparing the Modi and ODAC off the SA-31 which has many inputs. I will also test the DACs with the Magni as the amp, though that wont be as easy due to the Magni only having one input.
TMRaven, I love your comparison. Edited by Mad Lust Envy - 12/22/12 at 8:39pm