I love mine! Way underrated, imo. I blame Headroom's review from years ago (and my lack of writing a counter argument
). Anyway, I've yet to hear any of the objectionable things they did *shrug*.
Classic AKG house sound - awesome midrange, tight (if not too-far extended) bass, delicate highs (if a bit rolled-off on this model). Does not colour the recording - what's in there is what you get. Does a terrific job with percussive attack & decay - among the best I've heard from
any headphone. Grand piano's & snare drums sound truly lifelike. Female vocals 2-die-4. Very cohesive sound. The two drivers in each earpiece work in perfect concert, and are not apparent at all.
Give them a good recording/source, & you will be rewarded. Conversely, feed it crap, and that's probably what you'll hear back (as with any good can). Also easily one of the most comfortable headphones ever. Play around a bit with positioning on your head, as it will yield subtle, but very real positive results in the sound.
For their current price on eBay for NOS, they're a steal, imo. A total sleeper closed can. I'm curious if a re-cable would do anything positive to it, but I'm enjoying mine too much to give them up, atm. I'm curious to A-B them against the current K271's, which I've heard before, but not simultaneously. FWIW, from memory I like the older model, but I'm still curious. Especially with the easy re-cable option on the 271's.