High Sensitivity Speakers that work best with SS

Is this intrinsic to these specific designs, i.e. it is simple not possible to achieve similar signal-to-noise rations when building powerful amps? Or, is this because in these designs the designers pay special attention to this (unlike most designers of powerful amps)?

With the designs I listed 'intrinsic' is probably the best word. I don't think either the First Watt or an SET can be particularly powerful, but the OTLs can- the biggest so far is 500 watts.

"Mapman, do you have in mind any specific combination of very efficient speakers and a powerful amp?"

THe powerful SS amps are my current Bel Canto ref1000a mono- blocks. No specific speakers in mind, though I am more interested initially with smaller designs with bass extension that might compare favorably in terms of both price and performance to a decent pair of lower efficiency monitors.

NVP,

I'm biamping my Avantgarde Uno's with 2 tact S2150 amps with excellent results. Each amp puts out 150 watts/channel. 1 amp for the tweeter's and 1 amp for the midrange. They are extremely quiet with no hum or hiss even with the high sensitivity of the Uno's.

I have 2 hi eff systems running on SS amplification there are many SS amps and hi eff loudspeakers that work well together.