Yeh, it's always gonna be different strokes for different folks. As i said earlier, I abused BBE/Jet Effect and I kinda liked it lol, but for some it is more milder manipulation. For some they want EQ Flat and tinker more with the DSPs, ain't nothing wrong with that. I also noticed the -1 channel balance, makes sense to me because I do recall heading towards the channel balance quite a fair bit when I was using my Cowon's, something just felt 'off', this might explain it. Sometimes I had channel balance out by a factor of 3 before it sounded central to me! I have not had to use any channel balance on my AP100 tho. Channel Balance is prolly one of those options least tinkered with, not everyone's hearing is equal both sides, users might gain significant sound improvement by changing the slider slightly a notch or two, everyone should have a go and doing that imo.