Features 1" Aluminum Compression Style Tweeter Element Rated Cone Design Bi-Ribbed Treated Cloth Surround 1.5" High Output Til Midrange Voice Coil Protective Grill Included. Specifications Dynamic Power Handling: 500 watts Nominal Power Handling: 250 Frequency Response: 90Hz - 18KHz Impedance:4Ω Sensitivity: 102.7dB DIMENSIONS: Mounting Depth: 70mm Cutout Diameter: 142mm