Features 4” 3-Way Speaker Polypropylene Cone Mylar Dome Tweeter 10 oz. Ferric Oxide Magnet Rubber Surround Specifications Nominal Impedance : 4Ω Speaker Sensitivity : 89dB Frequency Response : 50Hz - 25KHz Nominal Music Power : 40 Watts Maximum Music Power : 120 Watts Dimensions Overall Diameter: 5.3”/134.62 mm Mounting Depth: 2”/ 50.8 mm Cutout Diameter: 4.5”/ 114.3 mm Description