I agree and emphasize that tube power actually seems to increase against higher impedance loads not the other way around. I understand that this is a lack of higher current being made on demand by tubes in that face of low impedance. If you want more watts output then you need more tubes and overall bigger tube amps to get that. This is one of tube's limitations, which in my mind are made up for by the imagery and tone tubes are capable of. I have not heard with SS amps that equal it. Some fine SS amps do image pretty well but not to the extent a tube power amp does.
