Thanks to Stereo Everywhere® technology and a "they've-thought-of-everything" design, the cool Bose® 191 speakers flood your favorite room with classic Bose sound, without filling up your living area with bulky speakers and stands. They don't call them Virtually Invisible® for nothing. Two full-range drivers in an Articulated Array® speaker design deliver great performance. Bose's famous Stereo Everywhere® technology sends rich stereo sound all over, so you don't have to search for a small "sweet spot" to really enjoy your music. And proprietary ported enclosures provide clean, consistent performance — especially in the lower frequencies — regardless of the space behind your wall or above your ceiling. These easy-to-install speakers can be placed in your walls or your ceilings, and they come with a pair of rectangular grilles and a pair of circular grilles — you get to choose which shape best matches your room's look. The grilles and grille frames are finished in white, but are paintable to match your decor.