I think I'll be selling or trading my 680s. I've burned them in plenty and have given them lots of listening time and have concluded that the sound signature just isn't to my liking. It's a pity, really, as I love the look and build-quality of these cans. Also, I must confess that them being Japan-exclusive and using carbon nanotube drivers increases their appeal. If only I could enjoy the way they sound!
Honestly, the extreme coloration of these cans makes me enjoy them even less than my KSC-75s, a can which cost me just $15! I was expecting these cans to be on the neutral side, but they're far from neutral. I can understand how these could appeal to people, but they're just not my thing. Though I can enjoy "fun" cans, I don't like my cans to be too "fun". To me the 680s are like a cup of coffee with one too many spoonfuls of sugar in it; the extra sweetness (warmth) is all too apparent and drives me nuts. I realize that lots of people like warm cans, but these are just too warm for my liking.
Anyway, I don't know if I should sell these, give them to my niece or trade them for something. I could use some IEMs, something I've never owned before. I wonder if I could get HiFiMAN RE-400s or VSonic IEMs in exchange for these . . .
The first mistake you made was expecting them to be neutral. Where on earth did you get that from? These phones will never sound neutral, it's just not their style.
The S500 required almost a thousand listening/burn-in hours before the sig would even out and stabilise. Expect the S680 to require the same or more.
I think you're just not giving them a chance to be honest.
Edited by Lifted Andreas - 1/22/14 at 4:13am