I compared a few cans at a dealer yesterday.
Very short impressions:
AKG Q701 - Airy, bright, still preferred my K550
Harman Kardon BT - a lots of bass and treble, sounded terrible
Sennheiser HD558 - Nice tonal balance but dull sound.
Sennheiser HD598 - Clinical sound for such a headphone, bright but not detailed and layered. Wide but flat, not so impressive soundstage.
Sennheiser HD600 - Now that is a phone. Balanced, detailed. HD600 is a bit more grainy and perhaps more transparent than K550
but from my source i felt just the same level of detail. HD600 is same kind of neutral tonal balance but more forward, more highs
and some hi-fi like sound. It had more body to the mids, but i still liked how restrained, thoughtful the K550 sounds. The sennheiser
must be a better can but it was definetly not worth 2 as much in my portable cmoy setup. I guess the sennheiser does more that that
however i felt plenty of volume and juice with it and my 9V amp. It's even cheaper on ebay then a new K550. I swear i did not ask
for the HD650, my time was over..
Edited by angevoi - 10/26/12 at 1:03am