I'll first say that when I initially got these headphones and plugged them in, I was pretty disappointed.  The sound was thin, plasticy and terribly rough on my ears.  BUT I had read enough about the K701's to know that people recommend an extended break-in period of at least 100-200 hours.   I made a temporary setup in the laundry room: old iPod plugged into old Onkyo receiver, K701's plugged into receiver's headphone output.  I put a varied playlist on repeat, and kept the volume quite low at first.  I let it run 24/7, each day raising the...