Louisl - I have run my DAC direct into my poweramp for 3 months prior to purchasing my cortese. "No" preamp sounds very good, I am able to hear every note, every detail, the noise floor of the recordings is very apparent because my system is so quite. But this can be a little distracting because everything that is on a recording isn't necessarily music.
With the cortese I still hear every note, every MUSICAL detail, but the noise floor of the recordings isn't in your face although you can still hear it. There are plenty of things the cortese brings to my system that "no" preamp can not. These are palpability, presence, and the emotion of the music. And no, the cortese is not euphonic at all, I wouldn't have it if it was.
With the cortese I still hear every note, every MUSICAL detail, but the noise floor of the recordings isn't in your face although you can still hear it. There are plenty of things the cortese brings to my system that "no" preamp can not. These are palpability, presence, and the emotion of the music. And no, the cortese is not euphonic at all, I wouldn't have it if it was.