Vhiner
I have been using VAC PA90E1 amps with my Thiel CS1.5 speakers for about 4 years with no problems in triode (50 watts) or ultralinear mode (100 watts). Kevin Hayes @ Vac is very familiar with Thiel speakers and uses them in his own house. He can let you know which of his amps would work best with the CS3.7's. I would give him a call.
I have been using VAC PA90E1 amps with my Thiel CS1.5 speakers for about 4 years with no problems in triode (50 watts) or ultralinear mode (100 watts). Kevin Hayes @ Vac is very familiar with Thiel speakers and uses them in his own house. He can let you know which of his amps would work best with the CS3.7's. I would give him a call.