To be honest, the treble doesn't bother me anymore, they really settled down after a week, I am just hoping that Fostex purposely handicapped TH600 by omitting this stuffing, technically it should kill bouncing off the enclosure reflections and clear them up a bit, but we'll see, fiberloft is in a mail.
Compared to my other cans the same distortions were more hidden and I previously thought were just the cans treble, but can now more easily tell its the recordings.
Regardless the music still sounds better because of overall musical presentation is just a constant lively wow factor...
Edit I also noticing the "brain burn" effect as now my audio technica esw11 sounds like too much midrange... Noooo lol
Edited by Maxx134 - 12/24/13 at 11:10pm