Well after my PS Audio Digital Link III arrived, i fell in love with HD 650s again, seeing they are capable of so much more than i imagined, i was kinda disappointed that i had already placed in the order for my k 701s, and felt that they would go to waste. boy was i wrong...
out of the box, they sounded kinda bad, slightly too bright, soundstage was messed up and the sound was very thin and weak.
however, i had faith in them, i played some random songs and let them burn in.
after 2 days of burn in, i am totally impressed by them and have grown to like them more than the 650s and more than my sr325s.
people do not lie, the detail on these phones is just phenomenal! best detail i've ever heard, things the hd 650 would hide and veil are suddenly being noticed. these phones are just so detailed and while being very neutral and slightly clinical in sound, they still are quite musical and aren't as boring as some people put them out to be (perhaps with a bad source/amp they will sound that way, but i feel these phones are pretty decent as far as musicality goes).
the soundstage is perfect, very airy open and lively, instrumental songs just shine and these are also really good for trance music. female vocals are just near perfect and all the nice ambient sparkly noises you hear in trance songs come out sounding just right.
really makes some songs sound super realistic too, footsteps, instruments, breathing, its all done just right.
the bass is definitely not weak, its just balanced in with the rest of the music. i have finally begun to feel that even my hd 650s are too strong on the bass on some songs (ie. norah jones and other slower songs have an overpowering bass guitar on the songs that drowns out the vocals too much). while the bass might have to be boosted up a notch for some genres, its just about right, definitely the cleanest tightest most defined bass i have heard out of any cans. light drums sound very realistic and quite punchy and i am surprised by the bass on these cans on some of the songs, its fast, tight, and quite dynamic.
the midrange is very good, more upfront than the 650s and more detailed than the grados, just perfect, can't say too much more.
the highs...are beautiful, definitely more pronounced than the 650s highs and definitely less bright than grados. the highs are never shrill and never bright despite what some people say, some of the best i've ever heard.
i can't wait till they are finished burning in, after 20 hours, i can say that these are some of the best cans i've ever heard and definitely keepers, will update once my WA6SE comes in later this week.