Had these for just over 2 months now and have a couple hundred hours with them. These are a very balanced headphone in terms of the frequency range they are capable of. Paul Barton (the man who designs PSB speakers) suggests this is 20-20,000 Hz @ ± 1.5 Hz, and I believe him.   I find these to be VERY comfortable. They weigh in at almost a pound, but a nice pleather padding on the headband and nice soft pleather ear-cups make them literally disappear. Unless I move my head in some direction with speed, I don't notice that I'm wearing them. I've...