Thank you for explaining that to me, @erik_squires ; thanks for the link, @ditusa , thanks @everybody for the input.
So check your amp’s specs before you buy the Revel M126Be or any speaker.
@sbayne , well, that's what I meant about my propensity to measure once and cut twice. The speakers are already set up in my listening rfoom and being auditioned . . . and now I am finally asking that question. The amp is a Cary V12 and it does not seem to be straining to drive the speakers in 50 wpc triode mode. I have played around a bit with the 100 wpc ultralinear mode, but I believe I prefer the sound in triode.