Klipsch Audio CS-650-RSM In-Ceiling Loudspeaker (SINGLE)The Contractor Series CS-650-RSM summed-mono, in-ceiling loudspeaker features one dual voice coil wooferand two 1/2-inch tweeters, which accept both leftand right stereo signals for applications where there's only enough room for one speaker. Features:* Single speaker accepts two-channel input* Separate tweeters for each channel to maintain stereo effect* Rugged ABS frame* Shallow 4.5-inch mounting depth* Paintable to match ceiling Specifications:Frequency response 58Hz-20kHz±3dB Power handling 35 w max continuous(140 w peak) Sensitivity 91dB @ 1watt/1meter Nominal impedance 8 ohms Crossover frequency 3000Hz Tweeter two 0.5" (1.27cm) polymer dome, liquid-cooled Woofer one 6.5" (16.5) dual voice-coil, poly cone Enclosure material ABS Enclosure type Infinite baffle, front flush with ceiling Dimensions 9.5" (24.13cm) Cutout dimensions 8.125" (20.64cm) Mounting depth 4.5" (11.43cm) Installation kit R-650-IK Weight 3.5 lbs. (1.6kg)