I ordered this pair of wireless headphones because I wanted a wireless set with the best sound possible. Being bluetooth, I expected some compromise in sound quality. Boy was I wrong. I am blown away by the musicality, dynamism, and precision of these headphones. I have owned sennheiser HD800's, as well as several other high end headphones. Yes, you can probably find something that will out do these headphones if you hyper focus on some narrow band of audio pixels. But oh my, if you are mostly into music for music's sake these are amazingly musical. The sound stage is breathtaking. You know you are onto something when a new set of headphones has you going back over your music collection to hear old favorites with fresh ears. One of my pet peeves with many setups is what I call orchestral smearing: instruments losing their individuality in a blurry wall of sound. Not happening here, Solo voices on classical recordings have "air" around them, Bass extension is authoritative without being pushy or exaggerated and tight, tight, tight. Bring on those organ solos. Really, these headphones are a technical marvel, and whatever they are doing with the "direct digital drive" is not a gimmick. I would put these headphones up against wired headphones costing 4 times as much. Oh, and they are acceptably comfortable, not as comfortable as the HD800, but nothing is. Obviously much in the world of high end musical technology depends on your taste. This pair nails mine.