! Welcome to the club!!
give them some time to burn in, but with the harsh and sibilant mids, I set my iPod 7th gens EQ to treble reducer, seemed to cut it considerably? but burning them in makes up for alot of it also, and with around the 300 hour mark there still is some subtle mellowing going on?
and with different users, different results? seems like some are fine with it straight out of the box, and others notice significant changes after just a few hours of playtime and still others notice the mids mellowing more so after alot of playtime, I fall into the last catagory,
and I almost sold them because the mids where like glass breaking, mostly on vocals? but with instrumental pieces? simply AWESOME!!
so there is GREAT potential with the 600's, if you can get around some of the -'s,
with some its the fit and isolation, and in finding the right tips? I love and use the modded Head-Direct Lrg Dbl. flanges, anything else for me muddies up the sound, and makes it sound congested? and for a VERY VERY few there is talk about some kind of wind issus? lol, sorry couldn't resist, but the sound for me is 1000x's more engaging for my attention, then to noticing what the wind is or isn't doing,
but the biggest hurdle is with the mids? and when I threw a ZO into the mix, that seemed to take it 45% of the way to where it is now!!! which is AWESOME!!! and now for me its 95% resolved, with just enough left over to put a awesome shine to the sound!!!
so welcome to the club!!! get ready to be EXed, I think Ashton Kutcher might secretly be working at Sony! lol,