I'm not conversant in the electronics behind amplification and sources and headphones and how well they match. I've been told that the E9 is a bit of a mismatch with the HE-500 but not as bad as it could be because of the nature of Orthos.
I have an E9 with the gain flipped higher and both the HE-500 and my HD650s have always sounded better like this, but with the HE-500, it sounds like there might be some graininess in the treble...and maybe even some clipping depending on the quality of the recording.
However, turning the gain down pulls a LOT of the bass out of both cans, but it's very obvious in the HE-500. Does what I'm hearing (or think I'm hearing) make sense? Can someone help explain it?
Also, will the O2 have similar effects depending on gain or is it designed sufficiently that it will eliminate alterations in sound related to gain switching?
Thanks in advance to any of the more knowledgeable head-fi'ers who may pop in and tell me what I'm hearing.