tomthiel,
Despite recommendations to the contrary, and as with so many other recommendations here, I think there are better alternatives:
https://www.psaudio.com/products/bhk-signature-amplifier/#tab-specs
* "2 Ohm Stable for musical transients"
Perhaps for earlier Thiel's, but later ones live hovering just over 2 Ohms.
* "...though it will perform at its best with speakers having an impedance of 4 Ohms and above.- John Atkinson"