Without a doubt the K702's are a definite step up from the AD700. Bass goes down way deeper and treble is a bit more relaxed and cleaner without compromising that AD700 style grand soundstage. May take some work to find the right synergy amp and source wise however, while AD700's have the advantage of running fine without a dedicated amp AKG's do need one.
I am running the AD700's without a dedicated amp. I use them onyl with my PC's mobo soundcard that is Realtek ALC898 with High Quality 110dB SNR HD audio
- I plan to get the K702's and get an amp a month or two later. Think they'll be ok?