I listed some possible reasons for sound differences between 4 tube and 2 tube versions above. Not changing the grid circuit/PI load could hardly be one of them. The power tubes don't load the PI as long as there is no grid current.
I don't understand your logic.
Sorry, I was thinking incorrectly about the schematic, and going by things I had read that I cannot back up.
Originally posted by Enzo
I have a sign in my shop that says, "Never think up reasons not to check something."
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