Definitive Technology In-Wall RSS II Referance Ceiling Surround/Wall 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 6.5-inch bass/mid drivers and two 6.5-inch planar pressure-coupled low bass radiators</li><li>Frequency response: 22Hz - 30kHz</li><li>Equipped with two 1-inch pure aluminum dome tweeters</li><li>Outer flange size: 8.13 W x 29.75 H x 3.88 D inches</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31q9tr93BbL.jpg" noproxy>