There's a 50cc class of racing motorbikes. Back in the 50s and 60s it became all about how many cylinders you could get to displace only 50cc. Things got real small and because things really didn't weigh all that much revs were over 20,000! So they put a stop to it and 50cc is now limited to one cylinder.
In the audio world this would be akin to using a lot of really small tubes to make an amp but it would be a really poor analogy.
Yeah but Ralph you are Da Man with stuff like this so I have to ask, what about going the other way? Why not use one great big high power tube? The reason I ask is some guys I respect are going that way with SET and real happy with it. Of course everything else still matters too but might there some inherent advantage to using fewer tubes?