I use it alone with active studio monitors (Dynaudio) and in pair with Corda Classic ff with Ultrasone Pro900. I am not going to give you the same reading, so here is some impressions after update to ff.
Whatever I throw at it, from techno, heavy metal to live symphony recordings, I could clearly hear the difference which I would describe as more meat in the music. It hits hard but now with baseball bat instead of straw. However everything seems to be as it should be (neutral), there is not any loss in it's linearity.
Main difference is very audible on my monitors. 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.
If you can, just try it.
Awesome customer support - it is standard.
