Triode mode vs pento mode


I'm new to tube amps/preamps and have a very basic question. What's the difference between triode and pentomodes? Thanks.
hugo1

Showing 2 responses by learsfool

I would add to some of the excellent responses above that if you happen to be using 101dB or even more high efficiency speakers, the power will not be an issue at all.
Forgot to add that if you are using an amp that switches between the two, it can also be recording dependent as to which mode actually sounds better, though generally the triode one will. But this is only a generalization.