Niles CM7SI (Ea) 7-inch 2-Way Stereo Input In-Ceiling Loudspeaker (FG01659) Single Speaker - Sold Individually - Purchase Two for a Pair. 7" Glass Fiber Woofer Cone With A Curvilinear Profile For Smoother Sound And Less Peaking At High Frequencies. Glass Fiber Dual Voice Coil Woofer Reproduces Left And Right Channel Inputs From A Single Speaker High Quality Butyl Surround Increases Sensitivity And Preserves Durability. Dual 1" Fluid-cooled UltraSilk Tweeters Provide Wide Dispersion For Clear And Detailed High Frequencies Bridge-mounted Stereo Imaging (SI) Tweeter Array Directs The High-frequency Sounds From Both The Left And Right Channels At Opposing Angles To Preserve Stereo Separation Magnetically Attached, Rust-resistant Grille Covers Install Quickly And Provide A Low Profile Look.Weather Resistant Construction Reduces Installation Limitations And Provides Unique Solutions In Showers Or Outdoors Under Eaves