Product Introduction: New Product Professional Audio 18 Inch Woofer Model No.: 18SW100-202 This newly designed 18 inch professional subwoofer uses 220×25mm thick ferrite magnet & 4 inch voice coil. The rated power is around 1000 watts, and the maximum power can reach 2000 watts. High quality carbon fiber cone & dust cap not only make it look nicer, but also produce perfect sound. If you have requirement for superior quality sound, it's a good choice you cannot miss. General Specifications: Magnet Size: 220×25H Sensitivity: 95 dB