The system grow on me, slowly and intoxicating... I didn't imagine how the pitch black silent background could make everything so distinct, clean... it's like wearing the glasses after years of myopia. the hd600 is grateful to reach such quantity of current, and it is ready to transform it all in pure music. everything's fast and pounding. It's an agile giant made of music like a well synchronized orchestra, the system is ready to go from 0 to 100 db with no hesitation. astonishing. no ground loops at all. with the 2 volts out of the d10s I can easily use the gain at the 3° position to revive the quietest tunes. try to listen "the seventh one" album from a weak source: inaudible volume or noise and distortion. This is one of the most well recorded album but it requires precision, power, black background and tonal honesty. In some tracks the bass is so controlled that I found myself waiting for the usual distortion... and sometimes the real rumble arrives with an authority that I didn't experienced before. I've instantly learned what a distorted bass was. Astonishing. even my k361 accept half of the volume from the mighty duo and the advanced titanium driver don't distort. All the distortion i've ever heard was coming from my weak electronic.