Got the PM-2 in and have been putting it through my normal tracks. Very early impressions (subject to change):
- Less warmth than PM-1, overall more neutral balance. Seems more in line with my HE-500, but overall more laid-back and less punchy (i.e. still a bit limpish). Good tonality.
- Marv was spot on about what he mentioned with the 8KHz peak. Not exaggerated, but gives a less pleasant, rougher sound than having one at, say, 10KHz. But it's not really a problem...just stands out a bit. I think Oppo could have and should have done a bit better here. I'm already working on basic front mods to smooth it out a bit, because stuff like this easily annoys me. (About to go to bed and am tired, which is when things like this really get to me.)
- Not nearly as constricting sounding in terms of air and soundstage. Still not a particularly open sounding headphone.
- Not the most clear across the spectrum headphones I've ever heard.
- Goddamn, this cable is microphonic. Scares me sometimes while listening.
VERY quick measurement attached. Was even too lazy to edit out the ugly window parts. Left channel, from left ear, ~90dB at 1KHz (playing 0dB signal). Full review and measurements to come in next day or two.