A small update to my previous post. I have been running burn-in track from 2XHD AUDIOPHILE HI-RES TEST ALBUM for about 100 hours now and subjectively bass have improved. So I can say that at the moment I am 100% satisfied with the sound. I haven't tested the microphone yet, since I am at work till mid October. I remember quite a few people were asking about the weight of the headphones. I finally got to the proper scales and my pair weighs 490 grams without the cable.