4 ohm speakers with tube amps?

Elevick, sorry to hear of your bad experience. I just financed a $2200 3 way speaker designed by a DIYer from Madisound. An absolute mess. 83db!!!, Not one good thing about this speaker, i sold them for $1K. That is funny though, 2.5 ohms! worthless! I'm close to ordering the Thor kit, she's a winner! Trust me the Seas Excel midwoofers are real performers.

Impedance ratings usually mention nominal (worthless?) and minimum impedance loads (valueable). Thiel offers quite a bit of detail re: the specs of their products. A low impedance load does not make a speaker "worthless" it just requires appropriate amplification. If one becomes surprised by true impedance loads after purchase, I think it indicates either a lack of homework prior to purchase or poor dealer support (poor dealer support would be unusual with Thiels).

Yes, true. Worthless for my ideal set up. Could you say in general the higher the ohms and db level, then the better the sensitivity and thus less stress on the amp, especially a tube amp. Thus the lower the ohms, the less response from amp, the less finesse. In general. I've heard good things about the Thiels. But i think i found exactly what i'm looking for in the Thor, for a heck of alot less than the Thiels.

I would never pay $2K+ for a 2 way, the Thiel 1.6. With the Thor you get 2 (TWO!) midwoofers/cabinet PLUS a "state of the art" tweeter PLUS one very beautiful cabinet, for less than... $2K. I'll post a review soon.

Tweekerman, yes I could say that about some amps, but the inverse is true as well. Some solid state amps don't work very well on very high impedance loads and the same argument could be used against those speakers. I look forward to your review.