Upgrade your home theatre with the Polk audio signature s15 speaker. This bookshelf speaker comes with all the latest technology features to give you clear and detailed audio without any interruption.  Polk signature s 15 is designed with a unique touch to make your home theatre look good. This soundbar s-15 Polk has a dynamic driver, thrilling baas, and power port technology to deliver the best sound quality to your ears.  Dynamic Balance ensures a rich, clean, full-range sound no matter what you’re listening to. This patented technology eliminates issues that reduce Polk Audio Compact shelf speaker performance.