Expected a lot from the technical data but was sorely disappointed after listening it. Sound is flat, lacks energy and excitement. I am glad that I did not order it blind as I did with X10, which was total disappointment, X20 sounds a little bit better but not enough to use it. I have X3 for a couple of years now and it is an excellent DAP even with all its interface limitations and for a price it is just a steal. I am really puzzled, why in the world xDuoo could not repeat their their success with X3?