its my 1st headphone so cant compare with any other headphone, (although i have hd 668b too now..) my 1st impression, the bass is not too powerfull but i still can hear it clearly, the mid sounds forward, i feel like the singers singing in front of me (or nearby me), the high (treble) is a bit...

great value, nice sound, very detail, but makes my ear sweat when i use in a long term(2-3 hr)..