Jostler3 - you are dragging me off point into an irrelevancy. I am not interested in whose ***** is bigger, just trying to make a simple point that you are failing to comprehend. What kind of scientist are you if you have no powers of observation? I am NOT claiming Nyq'ies maths are wrong. I am NOT claiming that push-pull amps do not show lower measured distortion that single-ended. I am NOT claiming that transistor amps do not have lower measured distortion than valves. What I am saying is that it is notable that most significant scientific breakthroughs in this area in the last 40 to 50 years have seemed to many of us to take us down unmusical paths, and that recently people have appreciated this to the extent that you can put together a system based on the vinyl LP, single-ended valve amplification, and high sensitivity and high impedence speakers that is at least as truthful to the music as any CD, SS amp, inefficient low impedence speaker system. I am a scientist and believe in the scientific method. But it dismays me when scientists have such blind faith in the theories they understand as to deny experienced phenomena - such as Stevenmj's engineer friend who believes all speaker cables sound the same. That is the topic of this thread. My point is that we have seen this closed-minded approach from scientists for years - ie. "digital interconnects cannot sound different". I am suggesting their closed-minded views based on a meagre understanding of what goes on in an audio system are not worth listening to. Their universe is too small a place to have the debate in. Though your ego drives you to prove I am ignorant and you are a scientific guru, and so you have chosen to misinterpret my post to your satisfaction - I do not care. I do not propose to feed your ego any further by continuing to explain my first post to you, or respond to your irrelevant challenges.