A tube is not an equalizer.
If you compare a solid-state amp and a tube amp in a high-gain setup (heavy metal eg where tube amp is the king), the differences are minimum.
Changing the amp’s _speaker_ and/or mic positioning will give you more radical results rather than changing the tube(s) in your amp.
Nowadays a lot of touring musicians are changing their setups to solutions like Kemper, since tube amps are bulky, fragile and expensive. Technology has gone a long way since the first amp sims.
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