Had listened HE500 yesterday at meet, this thing was really impressing me.
The sound is crystal clear while still maintaning smoothness. My mainly songs are acoustic, slow rock, pop and vocal jazz, and I think this is the best HE-Series for me, HE6 is just simply too dry and produce too much sibilant and harsh for me. HE500 is definitely smoother, yeah there're some harshness that I still feel with, but it's not enough to annoyed me.
at low and moderate volume I think it's best for HE500, at loud volume I feel there is an "emptiness" at lower mid side, make the vocal becomes a bit too thin, but I think if your songs mainly cover by female voices (like me), then this isn't a big problem.
I like the bass, a bit too much for me (have to admit, I don't really like bass punch), but the bass quality is definitely at good side, it's tight and have good speed.
If I have to choose between HE500, HE6 and LCD2, then I'll go with HE500 any day. (HE600 too sharp treble, LCD2 is a bit too dark and produce too many reverb, feel like the singer sings in a "drum"). I think HE500 has the most balance sound compare to the rest of 2.
note: I tested HE500 with Dared MP5 by its speaker output.
Just curious, is any dac+amp combo that produce enough power for HE500? at their site it was wrote minimal 1,5-2 watt for HE500, so I think DACport is at least can fullfill the minimal requirement, right? (at official spec, DACport can produce max power output 1,5 watt)