Speakers that are good with tubes

I’d put forward tannoy Berkeley or even Tannoy GRFs 

Coincident Technology, Verity Audio, Reference 3a, most horn speakers, I could go on.  Hell, even Joseph Audio speakers are potentially tube friendly given their easy phase angles and is why Jeff Joseph doesn’t readily disclose sensitivity specs because that’s not the only factor that makes a speaker “tube friendly” or not.  You gotta get into the details of what frequency impedance drops, phase angles, etc. before determining if a speaker is “tube friendly” or not.  The devil is in the details, and also in the tube amp itself. 

Legacy Audio, Goldenear Triton Ref's or 1.r's.

Spatial Audio Lab X5s and X3s. High efficient, open baffle speakers you can drive with 2 plus watt tube amps. 

I use Klipsch Cornwalls with a 45 SET amp............. about 1-1/2 watts.

Couldn't be happier!