Just to clarify, when you folks are saying 50 on the volume do you mean 50 as on the actual volume scale on the player which goes from 0-75 or 50 meaning halfway between 0-75?
I am 50 next month and just had my annual hearing check up and I can hear frequencies up 21Khz still so have pretty good hearing. Depending on which headphones I use my volume setting when listening directly out of the 120 varies between 40-55 on the scale of 0-75.
40 for the Heaven S and around the 55 mark on most tracks for the DT1350's. I think an important thing to note here is what type of music folks are listening to as well. Is the music heavily compressed at the mastering stage, if so your going to listen at lower volumes as the sound is already boosted.
All of my HDTT recordings are very quiet as little or no compression has been used in the mastering of them so they need higher volumes on the player. Conversely one of my rips from a compilation Dire Straits CD though not bad needs far less volume to achieve the same listening levels!
I was referring to the volume on a 0-75 scale. Listening through a jh16 my volume never exceeds 40. 26 for the more compressed songs and around 32-35 for hd tracks. And 40 for those very soft songs but hardly the case.