Awesome. Is it a keeper? My impression so far this is a quiet listening headphone, regardless of music. I enjoy these more at a quiet levels, whereas with AD900x is really fun loud. It's not that the music deteriorates loud with these K712, it gets less enjoyable for some reason I can't put a finger on yet.
Keeper? I'll put it this way, if I had to sell some headphones, this one would unlikely get the boot. It definitively has the general 700 series sound, but the K712 is definitely the easiest one to enjoy out of the K701/K702/Q701/K601/K501/K500/K400. The K712 comfort is a major winner! I haven't tried the K702.65, nor do I care to really. The 700 series in general presents sound in a wispy, airy way. I believe this is ideal for gaming if you are into that. The K712 found a nice balance of lower frequencies to compensate for its lighter presentation I guess. If I had to compare to other AKGs, the K1K is a completely different beast that presents sound in a completely different way. The K1K is much more forward and direct while the 700 series is far away and indirect. The K240 and K340 series are closer to the K1K than the other flagships and semi-flagships from AKG. The K400/K401/K500/K501 are very similar to the 700 series, but definitively not as similar as the 700 series compared to itself.