Pros: superb instrument clarity,bright,clear mids,flawless
Cons: clamping force,pads could have been better
I have many audiophile headphones like sony zx700,koss porta pro,soundmagic e10,pl 11,skullcandy uprock,. out of whole least nothing sound better than my superlux HD 668B. this headphone is must for audiophiles who want their instruments to hear every note with ease. guitar sound will blow ur mind. may be not comfortable as zx700 but sound is awesome. bass is adequate. goes deep and low but rumbling is not present as soundmagic E10. u can hear every sound with ease. bass does not disturb the whole frequency response. sound is neutral,no fake sound,lower mids slightly recessed. it has detaching cable of 1m and 3m respectively. u can remove the pads and change with akg 701. though u will not feel pain for 2 or three hours(sufficient for movies). these are open back headphones and sound leaks through it which is not a problem for me. sound is spacious with excellent instrument separation. if you want a sound for $150 in $50 then these are for u. may be they are not built strong but if u look on the heart of headphone which is its sound, these are above par and are better than grados.
if u want a true audiophile headphone then look no further.