I agree; have got mine since december '15 but find them too large as well. Thinking of sending them back and getting them adjusted more to the size of my head (which is not that small, mind you). I think Hifiman should spend more attention to this problem. The HE500 had the same problem and I...

Good suggestion imo.   I have my HE500 hooked-up to this rig for quite some time and it's capable to drive the phones to very loud levels. Impact and dynamics are good too, providing your music source is of good quality of course. Cable-wise I am using the Audioquest Carbon USB connected to an...