@llamaluv Burn-in is very real. I have yet to find any piece of gear that doesn't change over time, even if it's ever so slight. I always burn in my new cans in for at least 250 hours before I do any critical listening. I am thinking at least 150 hours for the SR1A before I make any judgements. So far, this headphone is exactly what I was looking for to drive with my 2 channel gear.