What I find that on some records the k702s actually sound very good, never mind the required burn-in time. It really varies from record to record and it makes me wonder if that's just a bad mastering job (boost the bass and treble and compress it all) and my headphones are just presenting that. You can hear deep in some, make out all the instruments and pinpoint them precisely but in some you have this mush and screech and I skip the track immediately.
Sounds like that might be case. Got any really clear examples?