i have the original lcd2 with the stiffer earpads, lettered grills but with angled connector inputs.
compared to the rev. 2, the difference is very much noticeable. these are my impressions and
may differ from others, as can be expected.
original:
superb bass with visceral impact
creamy, liquid mids, very intimate sound sig.
polite/restrained highs
high resolution and transparency. sound change
is very easily detectable with changes in the upstream
components.
rev.2:
tighter, better focused/controlled bass, not as visceral
less liquid/creamy mids, vocals noticeably more distant, less intimate
unrestrained highs, slightly zippy with female vocals at less than 10 hrs*
high resolution and very transparent as mentioned with
the original drivers. seemingly more balanced sound
throughout the freq. range.
soundstage of rev.2 seems bigger but may be due to the
mids being presented farther and less intimate relative to
original driver.
rev.2 seemed less efficient at first but it may've been due to
difference in mids presentation. original drivers present a
relatively forward mid compared to the rev.2 to my ears. thus
i end up raising the volume for rev.2 to match the mids.
* i have less than 10 hrs. on the rev. 2 but can't imagine burn-in being significant considering the
non-rigid, flexible diaphragm being suspended between two magnets. it's a different story for
coil-driven dynamic phones where the diaphragm holding the coil is rigid, hence burn-in may
or may not contribute to the loosening of the vibrating diaphragm and sound.