descloud
100+ Head-Fier
You might want to expand your imagination a bit because there are people who don't really find its sound signature that great. I didn't really dislike how they sounded when I had them, but I didn't find them excellent sounding, just decent to good. So to others, I could be described as 'disliking' their sound signature.I can't imagine anyone disliking the sound signature unless they're a bass head or treble masochist.
Bass can be heard, but too much mid-bass emphasis and lacks extension. Midrange was good because of its smooth quality and has good detail retrieval. But the treble region was too subdued to sound natural for me. Head stage was just about average to maybe slightly less than average (average for me being that I perceive the width to reach my shoulders).
Best I can describe this is for example playing an acoustic guitar because I play it. How you perceive an acoustic guitar harmonics will vary when listening from it in front of the one playing it, behind the one playing it, and when you're actually playing the guitar. So it's three different positions of how you will hear it (assuming you're in a room with the guitar and the player, as well as removing the factor of playing it through an amplifier). For me, listening to acoustic guitar tracks with the HD650/HD6XX is like being behind the guitar player in the point of reference I gave above. So most songs I listen to will have that particular quality from my perception.
This is not to say that they sound bad. The HD6XX are probably the best overall sounding headphone at the $200 price range, and they could be the only headphone for a good number of people (especially on this thread). Depending on your point of reference, the HD6XX/HD650 could be dark sounding or could be neutral sounding, and to some can even be bright sounding (and I've seen some anecdotes of these people). But to say that people disliking their sound signature are only in two camps of bass head or treble masochist is just a false dichotomy and narrow minded to say the least.