I use it with Daccord ff with Ultrasone Pro900. I am not going to give you the same reading, so here is some impressions after update to ff.
Some say it is more analogue like, I would say it is less lean and more open, energetic and intensive. In some way it gives you even less listening fatigue. Sound is cohesive natural and not vailed at all. I could clearly hear the difference which I would describe as more meat in the music. It hits hard but not overwhleming, there is not any audible loss in it's linearity.
With Corda Classic and Ultrasone the sound is superb but it is hard to say where DAC is over and AMP is coming in, it is so cohesive, just try it.
Awesome customer support - it is standard.
