Recently experimented with the 702 since the pads soften bit more after use. Notice I made them kinda tad too dark up top which affected some female voices and limited the air response good amount so I experiment with bit thinner layering of fiberglass with combination of flat polyfill pieces I cut with scissors. Got them defiantly better sounding where the sound tends to "float" around the ears with wider expansion and defiantly even out the midrange to my liking. Gonna leave them alone now. Also seems not only they sound more open now but seem to allow tad bit more lower level of information then they previously had. Still they sound not so well at extremely high listening levels and not a pair of headphones you can rock out with but since I listen to headphones most of the time in moderate levels and quiet environments it's not big issue to me.
After nodding them though these seem bit more impressive headphones than my first impressions of them. My DF's are getting recabled so when I get them back I test these out against my trusty and favorite headphone, my 240DF's. For now these will do.
i think the K701/2 need an amp with increased output impedance or an impedance dongle. i like 75-100R. 120R is just a tad bit too diffuse and soft in the bass.
the pads on my K702 are squished to hell. the K701 pads are pretty fresh. i prefer the K701.
i have my K240DF recabled with HD650 wire and newer K271mkii pleather pads. it would be a toss up depending on preferences. the DF does sound a bit more dynamic and groovy a la AD2000.
I find these to have nice amount of sub-sonic information. Just when you crank volume up too much you can hear it in th bass to start distorting what I mean.
I love using the k702 off most of speaker outputs but when I am on m uncle's for the weekend I use them on my brother's tablet which I find them not bad sounding on either with more enough volume. I just like they can be used off speaker outs as well while being dead quiet. It's like DF's off speaker outs.
I think it's more preference for bass response I personally think than output impedance response but I guess it's how you look at it cause either way can be right.
Overall I got them way I like them especially got the midrange more natural sounding. But I might still try to put a thin layer of polyfill inside the large section of the earcups to see if it'll add bit more expansion to the soundstage or not and cause I want to see what it will do out of curiosity.
I think though overall even rhythmdevil would be proud of me how I got these sounding now haha.