I like alot of treble and the highs on the M60's are great. The treble is working. I just like to turn up the levels as high as I can on my Onkyo.
Maybe my ears at 43 don't hear the highs the way I used to. I've never been much of a bass man. This was not intended as a knock on the 60's. I was just downstairs listening to Santana's Greatest Hits and they are magical with all the percussion on that disc.