Features 6.5” Three-Way Speaker Polypropelene Cone Piezo Tweeter Mylar Dome Midrange 15 oz. Ferric Oxide Magnet Rubber Surround Specifications Nominal Impedance : 4Ω Speaker Sensitivity : 91dB Frequency Response : 45Hz - 25KHz Nominal Music Power : 60 Watts Maximum Music Power : 180 Watts Dimensions Overall Diameter: 6.6"/ 167.64 mm Mounting Depth: 2"/ 50.38 mm Cutout Diameter: 5.6"/ 142.24 mm Description