You could buy a valve amplifier with an output transformer to get the impedance and current drive you need to drive the Sasha. You’ll adore the ’warm’ sound, a.k.a harmonic distortion, and convince yourself it is ’technically pure’, even though the amplifier is technically not capable of fulfilling the requirements of the speaker.
Alternately, you could buy a high current, low damping factor solid state amplifier that is ’technically pure’, but perhaps you won’t enjoy the sound so much.
What does you ear like the sound of?
Listen, be happy, buy it.