I don’t know anything about the internal workings of an amp. I know what the transformers are, power amp, pre amp, tubes, etc, but that about it.
I have an SS100. My friend brought his over, and this was before I sent it to Dave for mods. Both amps had the same tubes and pre amp tubes. Mine sounded a bit better, everyone there agreed. If they both have the same exact components, and same everything, why does one sound better when every factor was exactly the same? Clearly, some aspect of the amp has something that creates tone that is slightly better than the same exact amp sitting next to it. Why? I have not a clue. And before you say it, it wasn’t in my head. Unless there was some sort of group hallucinations occurring?