Features 5.25” Three-Way Speaker Polypropylene Cone Piezo Super Tweeter Mylar Dome Tweeter 12 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 : 140 Watts Dimensions Overall Diameter: 6.2"/ 157.48 mm Mounting Depth: 2"/ 50.8 mm Cutout Diameter: 5.3"/ 134.62 mm Description