Built to bring the big surround sound theater and music experience into the comfort of your living room, the Polk Signature S15 compact bookshelf speaker continues in the Polk tradition of American HiFi. Featuring Hi-Res certification, a new Dynamic Balance designed acoustic array, precision cross-overs, an anti-diffraction grille, modern cabinet styling and exclusive PowerPort technology, it delivers rich, clean, full-range sound in a totally re-imagined design. Supports latest hi-resolution audio files, plus Dolby & DTS surround technologies that ensure realistic reproduction of vocals and instruments. With patented PowerPort technology S15 delivers 3dB more bass response than a traditional ported speaker for your TV shows movies & music, while minimizing distortion. S15 speakers are timbre-matched to other Polk Audio floorstanding speakers, center channels & bookshelf speakers for seamless speaker-to-speaker blending effects in multi-channel systems. They can be used as front and/or surround speakers in a home theater setup, or work perfectly in a simple stereo system.