So far I've tried EQ on all the headphones I've got that have a corresponding oratory EQ and whilst I agree it does take some of what you may call the character out of them it does also do what it says on the tin which is that it equalises the overall sound reproduction.

For example it balances out my meze 99 Classics but depending on how I feel I might not use EQ to enjoy their increased bass.

Granted not all the oratory EQ are going to be to your liking and it does state that on the sub. Using the 99 classic example above I actually have the oratory EQ and my preferred EQ as separate presets as I had to reduce one of the bands as I found it sharp to my hearing.