Yes - if you've got a solid AC powered amplifier, and listen to lossless files
(and or CD's/vinyl).
I'll note here that I recently picked up a new set of K702's, made in China -
the K702's I had about a year ago were made in Austria - and the new ones
(from memory) sound better to me than the older ones. The build quality is
virtually identical, and they seem to have more bass, a softer yet fully detailed
high end, slightly less soundstage, and a more coherent, stable presentation all
around. All for $225 or so.
What I'm suggesting is that the "new" K702 may be enough improvement for
many over the "old" K702,
But still, the K712 outdoes even the new K702. In a quite subtle way it's a
spectacular headphone. As long as there's enough juice behind it IME.
An ALO National, JDS O2, or similar large portable just won't cut it with
the K712's. Again, IME.