The main disadvantage with smaller drivers (Fostex) may be the rather unpleasant tonal domination of the mid-band, while the bigger Audeze membranes are allowing the bass level not to fall off downwards. Just a thought.
( I have only heard the Fostes unmodded, and hated it. Much of the music I listen to already has too much energy in the mid-band, so to speak (piano), and in addition the ears have higher sensitivity in this area. I could not live with such a thing!).
and in addition (!!) I always listen at a moderate level, which considerably is accentuating the mids.
Edited by chetlanin - 12/7/11 at 7:22pm