I figure a low power amp cranked up all the way- is better that a high power amp dumbed down with a master volume or attenuator. It sounds better and that's been my philosophy of lower wattage amps. So I lower the wattage, and tweak to get the best sound in triode. I play it wide open. True pentode sounds different. But to my ears, triode sounds more articulate. Triode is more "hi fi" sounding to my ears.