morphsci.....i donn't know what mumbo jumbo you're talkin about, BUTTTTTTTTT in my 40 some years of putting together audio sytems, I never tolarted a piece of equipment that I could hear hiss. One of my first big Scott amps (it was almost as big as a 1/2 of a sheet of plywood) well It seemed that big at the time, I took home and returned three units before the fourth was hiss free in the circuits and meet my creteria of hiss free. If the parts are good, you donn't get hiss.PERIODDDDDDDD Just seems strange that this wasn't noticed once again by our "BETA Testers" hhhhhhhhhhhmmmmmmmmmmmmm????????????