Dopogue, Interesting and I am glad to hear the SET's are working for you. Here is an interesting quote from Mr. Gallo himself which I ripped from 6Moons. "As Srajan noted in his review, his 8wpc push/pull MiniMax tube amp can drive the Ref3s to satisfying levels but it certainly loses out in bass control. The high-current ICEpower amps he's currently reviewing or the high-power Spectron digital amp I've been using are true champs in that regard. This is a reminder that it's perhaps more important to first find the best amplifier for the full-range input of the Ref3s without relying too much on the bass augmentation amp to address certain performance parameters."