Thiel Owners

@Beetlemania, I’ll say this one more time. IIt’s not about ultimate volume levels!It’s about dealing with impedance!
Look at the graphs of distortion levels in the previously posted links.
Your correct, if it was about ultimate volume levels, I’d have very different speakers.

Yawn. Stereophile amp measurements tell you the outer limits of the unit. If I needed anything even close to 200+ W at 2 ohm continuous, you would have a point. But . . .
never mind. You can have the last word. 

My 2.2s are used almost exclusively for kids tv shows these days and they're hooked up to a ~$900 Yamaha HT receiver.  I'm surprised at how deep and forceful the bass is even from this very modest power source.  I'm sure there'd be some improvement with a big power amp but it's pretty darn good the way it is.  They most definitely don't require a massive amount of power.  My 3.7s are hooked up to a pair of Cambridge 840s running bridged mono, have been for the last 7 years, and work great this way.  I was somewhat afraid that the low impedance combined with bridging would be a problem but it hasn't been.  

I'm sure some Thiel models require monster amplifiers but the ones I have definitely do fine with more moderate amps.  I don't listen especially loud so I'm sure that's a factor.  Maybe the 3.7s with their well-behaved drivers and relatively simple crossover don't present as difficult of a load as some other Thiels do.  I did notice a significant improvement in bass definition when changing from one amp to 2.  

I would like to once again weigh in on this issue as i have owned five different models of Thiel going back to the 2.0 and have used many different amps including modified Haflers (way back),  Audio Research,  Rowlands,  Quads,  Marantz Reference,  old PS Audio,  and now the PS BHK 250.   To my knowledge i have never had a compatibility issue and i have been know to crank them a bit (but not above 90DB).   I think any well designed amp from a reputable company (Pass, ARC,  PS, Bryston, etc.)  should all be fine unless one really really plays them loud, but then that is not what Thiel speakers are for.  They are about quality not quantity.

SDL4:  not trying to get you to spend money,  but the transition from 2.2's to 2.4's was fantastic. one of the biggest jumps i have ever made in audio.  I owned the 2.2's from 1991-2007 so they were my longest owned speaker and they were great.   But the 2.4 really changed the game.