Lanzar OPTI1024 Opti-Drive Pro Series 10-Inch 2000 Watt Coaxial Full Range 4 Ohm Subwoofer Speaker Single 10-inch Speaker - High Quality Black Paper Cone - Resin Coated Accordion Cloth Surround 1.5" High Temperature CCAW Voice Coil - 70 Oz. Super Strontium Ferrite Magnet Structure 1000 Watts RMS / 2000 Watts Peak Power - Frequency Response: 50Hz -22KHz Sensitivity: 95dB (1W/1M) - 1" Neodymium Home Tweeter - 4 Ohm Impedance Overall Diameter: 10.61", Cutout Diameter: 9.06", Mounting Depth: 4.33" - Detachable Grill