I wouldn't advise driving 92dB full-range speakers with a 300B SET amp, because you're gonna' clip and destroy the drivers eventually.Depends on the size of the room and what volume you listen at. I have Coincident Super Eclipse IIs with Welborne Labs Laurels, WE 300B valves. I live in an apartment so don't play my music particularly loud.
6 years and counting.
Regards,