Features: Woofer Cfrp (Carbon Fiber Reinforced Plastic) Cone With Spezialised Rubber Surround Hamr (High Amplitude Multi-Roll) Surround 25 Mm Voice Coil Magnet Material: Ferrite Grill Sold Separately: Kte-S50G Tweeter Tweeter Type: 1" Wide-Range Silk Dome Magnet Material: Neodymium Crossover Network Grade: 2Nd Order Network Design Specifications: Power Handling Peak Power: 170 Watts Rms Power: 55 Watts (Cta-2031 Compliant) Dimensions Woofer Frame 129 Mm Mounting Depth: 49.9 Mm Mounting Height: 15.9 Mm Magnet: 80.0 Mm General Frequency Range: 80 Hz - 22 Khz Impedance: 4 Ohms Sensitivity: 87 Db/W