Again, you may consider a tube pre...in order to 'soften' the sound.
The THIEL can be, depending on the other gear in the system, somewhat 'dry' sounding. Potato, potaaaato.
I always preferred them with a tube somewhere.
Kathy Gornik, (now owner of THIEL) and I used to say, laughingly, 'I never heard a solid state amp that I didn't like better with a tube preamp'....the meaning clear, especially in the context of THIEL speakers in the chain.
Larry