thieliste OPYou need to look at the impedance/-phase graph to make an informed decision.
My question of the day is if you had a budget of 50K to drop in a pre-power combo to drive a pair of Thiel CS 3.7 what would be your top 3 favorite choices
This speaker cries out for solid state with plenty of current, which to me says big muscle amps amps with bi-polar (bjt) output stages.
EG: Gryphon, Krell, D’Agostiono, ect ect .
(My choice would be a Gryphon Antillion Evo with user adjustable Class-A bias points while playing music)
http://www.gryphon-audio.dk/products/power-amplifiers/antileon-evo-stereo.aspx
https://www.stereophile.com/images/archivesart/1208T37fig1.jpg
- " CS3.7’s impedance remains between 2 and 3 ohms over much of the audioband (fig.1), and that there is a demanding combination of 3.8 ohms and –40° capacitive phase angle at 60Hz. Thiel specifies the impedance being nominally 4 ohms, with a minimum of 2.8 ohms. I actually found the minimum impedance to be 2.4 ohms at 125Hz. The difference between 2.8 and 2.4 ohms is academic, either mandating use of an amplifier that has no problem delivering high currents."
Cheers George