Definitive Technology In-Wall RLS III Speaker (Single， White)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Single reference in-ceiling/in-wall surround speaker</li><li>Equipped with two 4.5-inch bass/mid drivers and two 4.5-inch planar pressure-coupled low bass radiators</li><li>Frequency response: 26Hz - 30kHz</li><li>Equipped with two 1-inch pure aluminum dome tweeters</li><li>Outer dimensions: 11 W x 12.75 H inches</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41LqWGWg8qL.jpg" noproxy>