Definitive Technology UIWBPZ/A In-wall/Ceiling Bipolar Speakers (Pair, White) (Discontinued by Manufacturer) Pair of in-wall/in-ceiling rectangular bipolar built-in loudspeakers Equipped with two 6.5-inch bass/midrange drivers with non-resonant cast baskets Frequency response: 26Hz - 30kHz Equipped with two 1-inch pure aluminum dome tweeters Cut-out size: 7.44 W x 13.63 H inches