Everything but the quiet parts in classical music? I listen even quieter for pop music unless I'm in a really loud environment.
I'm 22 years old and trying to preserve my hearing in the long run, so I tend to listen pretty quietly. The M-100 is really efficient though, so having more than 30% maximum volume for music other than classical seems really strange to me.
Actually, I just did a test on the public bus just now.
Dr. Chesky's "Phrases" song from his "Dr. Chesky's Sensational, Fantastic, and Simply Amazing Binaural Sound Show (Binaural Plus)" album (DR21, which is probably one of the most dynamic songs I have in my library, and one of the quietest).
Versus Taylor Swift's "Sparks Fly" song (DR6). Even at this volume level in the bus, it is quiet loud for me, probably too loud. Hm, I miss singing along to this song. XD
So yeah, it seems very unusual to me that someone has to listen to their music at near maximum volume using a MacBook Pro with the M-100. :/
That is insane.
Wait a second. How do you have half notches on your volume? I only have full. What version of OSX are you running?