These studio headphones are very flat in theory, but actually the bass is extremely weak, and the upper mids are painful when used on my digital piano, so I had to push the bass all the way up and the mids almost all the way down. Thank heavens I have a three-band equalizer onboard. I might get better results with mixing recordings, but I wish I had bought the M40 instead, or another model altogether. I found the headphones comfortable to wear, but tricky to get on quickly because of their collapsable feature.