I should have also told you that when I calibrate my system I go to -20dB on the Yammy and then set each channel equal to 80dB. I throw this out because most people set their unit to be at 75dB when a reciever/pre-pro is turned to 0dB. So, hopefully you can see this hiss would have absolutely no bearing in real listening as I will never get within 5dB of the 0dB setting on the unit.