I put two pairs of the X-14 in a house a couple of months ago and will be adding a pair in the living room. These don't need to be in a book case to fill out the sound and in the house where I installed these, the kitchen is open to the informal dining area an beyond that is the Sun Room, which is close to 50' in total length, 9' high and 12' wide. To the left of the informal dining area is the Living Room and off of the Kitchen is the hallway to the front door and Living Room. The sound is exceptionally full and balanced, with excellent bass- no sense of straining. When I was told they were much improved over the previous model by the manager of the US consumer office for Dynaudio, I was a bit skeptical. Once I had a chance to play them here and install them, I'm a true believer.