"Thiel claims the 3.7, unlike all prior Thiel models, has a benign impedance characteristic that is easy to drive."
I kind'a doubt Thiel would make such a claim. Thiel has been designing that type of "benign impedance charateristic" for decades in all their speakers. For example; Thiel's own advertised measurements for their own 20 year old Thiel CS 3.5 is 4 Ohms nominal, 4 Ohms minimum. Perhaps Thiel's current measurements are more accurate, and perhaps their current speakers are better at this task, but Thiel has been aiming to do this, and has done so quite well for some time now.
I kind'a doubt Thiel would make such a claim. Thiel has been designing that type of "benign impedance charateristic" for decades in all their speakers. For example; Thiel's own advertised measurements for their own 20 year old Thiel CS 3.5 is 4 Ohms nominal, 4 Ohms minimum. Perhaps Thiel's current measurements are more accurate, and perhaps their current speakers are better at this task, but Thiel has been aiming to do this, and has done so quite well for some time now.