I was looking for an amp to pair with the 93db, 12ohm Spatial Audio M3 Triode Master open baffle speakers. I looked at all sorts of Class A, A/B, and D amps. I looked at tube and solid state amps. I remembered the sweet sound I got from an AVA Delta 120 amp years and years ago. I wanted to hear the Van Alstine sound of today. The SET 120 and the Spatials are a tremendous pairing. I listen to favorite old record after favorite old record, and they are all sounding like I've dreamed of having them sound all my life. It's a beautiful thing.
I'm as curious as the next guy, and I wonder what my speakers would sound like with an Ultravalve, but hey, the SET 120 sounds awesome, is $700 cheaper, and will never need replacement tubes.