Specially tuned for excellent ambient performance, with superb detail and natural musicality, even at low volume;Easy one-cut, drop-in installation puts built-in audio within reach, with Perfect Fit templates, a precision flange and (available) pre-construction brackets; achieve secure, vibration-free efficiency with a simple turn of the patented Rotating Cam system;Lightweight and stiff polymer drivers provide excellent damping and bass response;Aimable swivel tweeters for greater accuracy and more realistic imaging;Polk's proprietary, patented Dynamic Balance technology allows engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds