Features 2.0" (51 mm) Voice Coil Neodymium M-Ring Magnet Assembly Optimized for High Output SQ Sound Systems Weather Resistant Carbon Fiber Cone with cloth Surround Custom Die-Cast Aluminum Basket with Radial Venting Specifications Power Handling: 200 Watts Dynamic Wattage: 400 Watts Resonant Frequency (fs): 82.4 Hz D.C. Voice Coil Resistance (Re): 3Ω Mechanical Quality Factor (Qms): 3.38 Electrical Quality Factor (Qes): 0.49 Total Quality Factor (Qts): 0.42 Compliance Equivalent Volume (Vas):5.