Niles CM7MP (Ea) 7-inch 2-Way In-Ceiling Multi-Purpose Loudspeaker (FG01656) Integrated Woofer/baffle Design Delivers Greater Low Frequency Response By Employing A 7" Woofer Where Competitive Models Of The Same Outer Size Employ 6 1/2" Woofers Glass Fiber Woofer Cone Is Light, Strong And Well Damped To Provide "best In Class" Bass Response 1" Fluid-cooled UltraSilk Soft-dome Tweeter Provides For Clear And Detailed High Frequency Response Proprietary Bridge-mounted Tweeter-adjustment Mechanism Focuses The High Frequency Sound In Any Direction Up To 20 Without Diffraction Magnetically Attached, Rust-resistant Grille Covers Install Quickly And Provide A Low Profile Look