Thiel Owners

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. 

The 3.7s for sure were not as bad a load as the 7.2s.  I owned 2.3s before the 7.2s and now have 3.7s.  I also have SCS2s (using them for side and rear surround but had them as mains in the bedroom system of my old house).  When my friend worked at a local hifi shop many moons ago, I helped deliver most of their modes from the late 1990s for about 6 years. I currently drive my 3.7s with Class D (Modwright KWA 150SE before that and Bryston 14BSST before that and a smaller Bryston SST before that).  The 7.2s were in a large 2 story room and would shut down on a regular basis from the load presented to the Bryston 14BSST (they made a 20 amp version but I didn't have a 20 amp circuit).