For instance substitute a SS class AB amp with a DHT type be it SET or PP, very very different!Indeed. However this is predicated upon the speaker being of a design that will allow the use of SS Class AB, SET or PP tube amp.
Charles1dad (Threads | Answers | This Thread)
What if the speaker won't accommodate a SET tube amp? Then, the owner's amplifier options become limited.
Depending on the speaker selection, the ability to use a PP, SET or SS Class AB amp may not be available. Hence the recommendation to choose a speaker first, thus allowing a greater flexibility of amplifier topology if desired.