Really good headphones. I have used them for about ~ 70 hours now and I love them. If you listen to electronic music, it's hard to find better headphones. Really awesome and fast bass that provides a good punch without messing up the midrange and the rest of the sound. Ultrasone has a kind of special sound, hard to describe, but for me it took a while before I became accustomed to the sound. If you are looking for a balanced and "neutral" sound, you should look elsewhere, since Pro 900 is far from neutral. I listen mostly to progressive rock /...