Originally Posted by green giant
If I were to guess, you were hearing the room with the bass. I found the contour 20 to have a tremendous amount of bass for a bookshelf.
Not to criticize, but please stop calling certain models within the Dyn range bookshelf speakers.
A bookshelf is typically 11.25" inches deep. I have had the Special 25's, C1's, and the Focus 160's in my room at the same time. They are all too deep to place in a bookshelf. Also, they are rear-ported, which makes them inappropriate for a "bookshelf" install.
Call them monitors or stand-mounts, which they truly are.