What contributes most to a change in how an amplifier sounds?

Whether the amp is wired in an ultrlinear or a triode circuit.  

The loudness button.

@bigkidz , I remember a conversation I had with John Barnes (may he rest in peace) of Audio Unlimited quite a while back.  He was talking about a couple of tube amps and I forget how he exactly worded it, but it was to the effect of when when comparing amps and you separate the wheat from the chaff it is the transformer that makes the difference.

Reminds me a bit of the old story where organs of the body are having a fight over who was most important.  Can’t remember what the plot twist was — something like the little toe saving the day.

But the moral was the organs make up a team, all of which is “most important” depending on what is going on.

@davetheoilguy    when you go into cardiac arrest, I think the answer to the above will be clearer.

@davetheoilguy , the heart perfuses all of the organs, including itself and the liver; the liver will die if it is not perfused for a long enough period of time (cardiac muscle will die a lot quicker from absence of perfusion).

When heart rhythm that produces a pulse ceases, one is clinically dead. Liver function can cease but that does not meet the criteria for clinical death. Liver cancer can have a favorable prognosis, and if it doesn’t you will still have time to get your affairs in order as quality of life declines. On the other hand, if you go into cardiac arrest, if you are not in the right place and around the right people your life expectancy usually drops to under ten minutes.

Pretty sure I nailed it on the first post.

What!?  Not the loudness button??