Could this be one reason tubes (and perhaps records) sound better?

... which is why experiments are recreated, for validity. I am struggling to see any merit in your advice to someone who wants to experiment.

Lose the vinyl and the CDs and listen to reel to reel tape. It’s all you need.

... which is why experiments are recreated, for validity. I am struggling to see any merit in your advice to someone who wants to experiment.

Go ahead Mr. 24/7 lols.

The Nelson Pass article where he describes his little harmonics generator goes a long way to providing a clue to the clue deprived. I'm glad Nelson is around as sort of an "anti Ted." Also, well said jnorris2005, as I utterly agree.

I think most designers already knows this but has to find a combination from a lot of parameters. For example the designer of many Parasound amps has said that he worked hard to avoid the 7th harmonics since that don't sound good at all but many circuits produce them. Others may focus on other things.

Some like to use negative feedback in amps to make them measure better and others thinks that destroys the sound. The latest Dartzeel amp has configurable negative feedback. If you hover your mouse on their web site title you can see the phrase "In the name of music: listen first, measure later".
https://dartzeel.com/en/