Skar Audio SK4 4" 80W 2-Way Performance Coaxial Car Speakers, Pair Peak Power: 80 Watts (Pair), RMS Power: 40 Watts (Pair) Speaker Impedance: 4 Ohms | 1" Copper Voice Coil Pulp Fiber Cone and Butyl Rubber Surround Frequency Response: 70 - 20,000Hz | Sensitivity: 86 dB 0.8" High Performance Silk Dome Tweeter 4&#034; Performance Series Coaxial 2 Way Speaker System RMS Power: 40 Watts (Pair) Max Power: 80 Watts (Pair) 0.8&#034; (20.32mm) High Grade Silk Dome Tweeter Pulp Fiber Cone 1.00&#034; KSV Copper Voice Coil Rubber Surround 4 Ohm Impedance Frequency Response: 70 Hz - 20,000Hz Sensitivity: 86 dB