Definitive Technology In-Wall RSS III 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 5.25-inch bass/mid drivers and two 5.25-inch pressure-driven bass radiators</li><li>Frequency response: 24Hz - 30kHz</li><li>Equipped with two 1-inch pure aluminum dome tweeters</li><li>Outer dimensions: 7 W x 25 H inches</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21DFjuBX0cL.jpg" noproxy>