"Why not measure some of the tubes and SS today. And, then do some DBT listeing to see if anyone can differentiate between comparable ones. SETs by definition are just another audio joke."

First off, DBTs are not reliable, not proof. No scholar I know of will mentioned the results are fact, period. There is obviuosly a sonic diffence between amps and preamps.

Secondly, Who said SETs are the ultimate? I sure didn't. What about PP?

Thirdly, who says the specs measured today are ALL the specs necessary to measure?? You?? Do you have any proof that is true?
I want to see your proof, no sneaking around trying to wiggle out of it, ok.
I want to see you state that there isn't one more spec necessary to explain the sonic differences between components than that already given. And I want to read the reason why not.