SF Extremas

Semi is correct. There is no way in history a 100 watt tube amp will be able to power the Extremas.
The Extremas need so much power. The only tube amps that can power them are the big Conrad Johnsons, Jadis or the Audio Valve tube amps.
You need amps like the Rowland 7 mono blocks.
When the Extremas have the power, they sound incredible. The best midrange I ever heard in my life.
That Skaaning midbase is unreal.

Eldo, what people claim you can power them with 30watt set amps?
That is impossible. There is no chance in history the Extremas can sound good on such lower powered amps.