Pros: Great smooth, lush beautiful sound, very balanced and relaxing. Quite detailed. Dark. Very comfortable
Cons: Build quality
I love my HD650 for rock, jazz and weightier orchestral pieces. The sound is very detailed but somehow dark (which is good with some recordings). This headphone never sounds obtrusive or hard. It is very comfortable. I have it as a companion to another great headphone, AKG k701, and they work great with their parts of my record collection.