A friend has a pair powered by 2A3 SET amps built by John Wiesner, who partnered with Arthur Loesch in the post. Amazing amp designs and incredible craftsmanship. They put out 1.5 watts, I believe, which is definitely enough for these K-horns in his room (set up properly). Heard 8 watt push pulls and they didn't have the magic, and the volume control never got above 9:00 - not enough play for me because they got too loud too quick. 845 and KT88's & 300B's all had their merits but the 2A3's have a special magic.
Enjoy,
Bob
Enjoy,
Bob