Niles CM730DSC (Each) 7-inch In-Ceiling Speaker Patented Woofer Assembly Fully Pivots Up To 20 degrees To Focus The Bass And Midrange Tones Directly Into The Listening Area Twist And Lock Baffle And Frame Mechanism Facilitates Quick Installation And Trouble-free Upgrades Integrated Woofer/baffle Design Delivers Greater Low Frequency Response By Employing A 7-inch Woofer Polypropylene Cone Is Light, Strong And Well Damped To Provide Best In Class Bass Response Fluid-cooled UltraSilk Soft Dome Tweeter For Exceptional Clarity In The High Frequencies