4 ohm speakers with tube amps?

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).

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.