[robfine]

This isn’t truly analogous, but my music room is about 13’ x 16’ with a 12’ ceiling. I have my speakers along the long wall. They are Dynaudio Heritage Specials with 85 db sensitivity. I am running the Dyns with a PrimaLuna Dialogue Premium integrated amp. Each channel is currently powered by two Golden Lion KT-77/EL34 power tubes which puts put about 32 Watts per channel into 8 ohms. I also run it with KT-120s putting out 43 watts/channel. Both sets sound great. I think the EVO400 is the new version of the Dialogue Premium HP which is essentially double everything I have. I think it is a great amp. Also, this was my first venture into tubes and the PL makes it basically idiot-proof. It does automatic biasing. It tells you when a tube is bad. And the tubes last forever. I bought mine from Ivan with KT-120s and it sounded great. I didn’t need to retube for 8 years. The reason I got the KT-77/EL34s was supply chain issues for KT-150s that I wanted to try (KT-120s are available) so I figured waiting I would try “more tube sounding” tubes. There are a number of AAers running PL. It does a great job pushing my monitors.