Hmm, lots of people have looked at this thread but only two responded. Maybe I need to get more specific. Is there anyone in the Vancouver area with an HE90 or HE60 who would like to get together for a comparison with my O2s? Also, a friend of mine here has been designing/building headphone amps for his own interest, both for electrostats and dynamic phones, and we'd like to check out his amps against other high-quality amps, and with different dynamic headphones (we both only have Audeze).
If interested please reply or PM me.