Stereo tube amplifier recommendation with Bricasti M12 and Devore O/96

I'd look at an amp with balanced inputs and about 50-60 watts; that will do nicely with that speaker.

I would look into some higher end SET/SEP tube amps. Those speakers were made with tube amps in mind. Maybe narrow the budget down first. If the sky is the limit, I’d be interested in trying the Modwright Ambrose A30 Tube Monoblocks. Others to consider would be Shindo and Mastersound.

From customer feedback we've gotten, the speaker is not as efficient as you might expect- that is why I recommend the higher power of 50-60 watts. If you are in a smaller room you can get by with less power, but if using an SET and really showing off what that amp can do it will have to be a smaller room.