Thiel Owners

More laughing...

15x21x10 is just fine for CS 3.7 with good room treatment.

The real beauty w/ the CS 3.7 is to place it into a listening space of 20x20 (at least) and experience its inherent soundstaging, imaging, overall unrivaled dynamics. I suspect a smaller space might work, it would have to be something "special" though?  Custom built and tuned room perhaps?

Happy Listening!

Jafant, as the 3.7's are missing the first octave; they are not full range. For that sub woofer augmentation is necessary. The 3.7's have their own different qualities, attributes. All of the Thiel CS models have the same placement recommendations. Many of Thiel's earlier models (pre-Thiel sub woofers?) had deeper bass, including all of the previous CS 3 series.
BTW, a 20 X 20 room would not be desirable.