The Problem: I've found that for pretty much all track I can detect an extremely audible hiss/sibilance. However, as it turns out this happens no mater what audio source I listen to, no matter where the tracks have been downloaded from, no matter what headphones/IEM I use. It's frustrating.
Is it possible to have extremely simbilance prone ears?
Partial Solution: The more I listen to different audio equipment, the more I'm convinced its a problem with my ears. On the up-side, I recently got my FiiO E17. To conclude, I think the DAC in it helps with the sibilance a lot, even more so than EQ'ing the sound. Instead of being unbearable, it's MUCH more tame and just there. It isn't a complete solution, but its satisfactory to me.
Thanks for the outstanding replies to this thread everyone!
Edited by A Kennedy4 - 2/24/12 at 7:42pm