ACE800 8.0" 2 Way Pro Series Trim-less Style In-Ceiling Speaker, 8.0" Mica-Filled Polypropylene Cone and Butyl Rubber Surrounds, 1.0" Pivoting Silk Soft Dome Tweeter, Power Handling 120W, Frequency Response 58 Hz to 22kHz, Sensitivity 90 dB, 8 Ohm includes Contour Switchs +/- 3dB Bass and Treble, Cut Out 9 5/8", Installer Friendly Dog Leg Installation Brackets, 10 Year Warranty (Stereo Pair)