Hi, I'm new here and just created an account to post my experience with this setup so far.
My music collection consists primarily of stereo FLACs. With my headphones, I did a few enable/disable tests to see what the difference was like, and the vocals sounded less "defined" but the entirety of the songs would be more balanced.
I'm sure that it's subjective, but since I personally favour hearing the vocals more distinctly, I disabled this setup for now. I'm an average person, so I'm not qualified to say whether this setup is good, or not.
Perhaps this setup works better only if the songs themselves were meant for 5.1 surround sources, and not stereo sources. I think I'll stick to fooling around with the equalizer.