I listen 10 hrs a day when working (40hr weeks more sometimes).I work in heavey equipment and used to play loud guiter in bands so I think I have tinnitus anyway.I recently started listening to my kz sets at lower volume. 70 to 90 on my dap.Its max is 150 which is way to loud to stand with iems. I have jist ordered some oh10 ikko iems which hopefully will be better for my hearing. I will continue to keep thw volume low.