HIGH QUALITY SUBWOOFER HIGH QUALITY SUBWOOFERYS-B10092 magnet: 40 OZ,Y25frame: grey iron frameT-yoke: ... IDφ54.5×H8 voice coil: single 40HM,2",4layers ,black Aluminum,EI wire.cone: rubber edge pp coneterminal: chrome ... finished copper terminaldamper: yellow PCKgasket: black EVApower rating: 150Wmax power: 500WFrequency Response: F0(35HZ)~1200HZpacking: plastic ...