low power tube amp

i am looking at a few speakers
one is sopra 2 (rec power handling 40-300w)

Amp is built locally, class A SET, KT88, 20wpc or so

thanks

really appreciate all the info here....

I am planning to add a JL E-sub, which has a build-in active crosscover.
(ie preamp output to sub, then to power amp)

So the difficult low frequency load will be handled by the sub instead.

Any advice about this setup?

Also, my amp has a 4-ohm output, but doesn't that decrease the power rating to half? ie 10wpc?

thanks again

Doesn't the tonality issue apply to any amp given the not so flat impedance curve?
if my amp is able to drive the speakers without clipping at my listening level, then the tonality problem is the same as with a 200w amp correct?

from what I read so far, what's the advantage then to use a low powered amp? There are so many Class A SET out there I can't imagine everyone using speakers with 95+ efficiency 

found the website

I will be using this with the sopra 2.  The kt88 doesn't sound as nice as this with my last speaker (quad esl 63)

http://www.finaleaudio.com/829b-special/

talked to the amp designer, it does have negative feedback

yes, i also think the 829 amp is something special.
It had a great review by wall of sound in canada.

I compared it side by side with simaudio moon's flagship integrated amp, and the difference was not even subtle. The 829 had texture and detail way beyond simaudio's

thanks
you guys are a wealth of knowledge

thanks guys.....

any thoughts on adding an autoformer?