Do Thiel Audio CS3.7 Rock?

All the Thiel speakers I have heard are too bright for me; I don't know anyone who currently has them although they are made in this area. Possibly this is the sound you are looking for but I would think that there are European speakers available without paying the Transatlantic price penalty that would sound better. Gamut for example.

I disagree with Stanwal,

I have heard the 3.7's many times and they have never been what I would call bright by any means, they are very natural and a little polite to my ears. They can have excellent bass, but they require huge amps to get it (best I've heard so far was with the big Jeff Rowland mono's.

That said, though the bass was tight and went deep, not sure they would rock. A speaker needs to have high output and bass to really rock, I loved my Escalante Fremonts and now my Wilson Sasha's as they both are efficient and have high outputs, especially when paired with lots of power. Not sure how well the Thierls would do in this area.

The best speakers for Rock and also Classical and Jazz to my ears are the Odyssey Audio Kismet Reference Floorstanding Speakers. They are simply amazing. My rock taste goes from Metallica through Pink Floyd and everything in between. They never, ever disappoint.