Thiel CS6

I use a Krell 400cx with the CS6. They need current down at that critical 2.3 Ohm minimum and the Krell delivers. Great match and Jim approved when I told him what I was using with these.

Try a Butler amp. Thiel uses Butler amps to test their speakers.

I use the Pass Labs X350 too with my CS6 speakers. The dynamics are superb. It has never come up short for power.