Thank you, MalVeauX.

My source is notebook and then Meridian Explorer DAC. My music is classical, "Die Walkure" with Furtwangler 1954 is a good example of my misic. I've heard ATH-AD900, hd600, hd650 and Grado. Grado is not my case. I like ATH-AD900, I think they are "airy" and "sing" and hd6xx are ''not...