Polk Audio MC60 High Performance In-Ceiling Speaker<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Specially tuned for excellent ambient performance， with superb detail and natural musicality， even at low volume </span></li><li><span class="a-list-item"> 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 </span></li><li><span class="a-list-item"> Lightweight and stiff polymer drivers provide excellent damping and bass response </span></li><li><span class="a-list-item"> Aimable swivel tweeters for greater accuracy and more realistic imaging </span></li><li><span class="a-list-item"> 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 </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/61OZdvBpU4L.jpg" noproxy>