I have spent a fortune of headphones. Usually open backed Grado headphones, two pairs were over a grand. These blow everything I have tried out of the water. They are very comfortable. I can wear them all day. I use with high end audio equipment and hi res audio files. The sound could not be bettered for me. I hear stuff on albums I have had 50yrs that I didn’t know was there. If it’s any help my hearing was tested a few months ago and in is still 100% even though have always liked my music loud. I listen to Kate Bush, Dylan, Carly Simon, Pink Floyd, Joni Mitchell, Jake Bugg, Mary Gauthier, Iris Dement, Enigma and more. Quite an eclectic taste and these iems do very well on all.