Fuck, except, as previously mentioned recenserare, bit buggy software.
Edit: Driver Beyerdynamic DT 880 Edition 600 ohms splendidly! 20% volume setting in Windows is just right for me.
Very good sound (if you disable the X-Fi Crystalizer, which I personally think destroys the sound)
Would say that the sound is on par with Xonar Essence STX as I had before.
A marked difference is that this unit sits outside the computer and microphone lets be better. Noise reduction is incredible.
The drive Isar firmware is not tip top yet. Otherwise I would have given it full marks.