Precision-cast aluminum frame full-range speaker Ceramicized aluminum diaphragm NdFeB strong magnetic design, high efficiency response 600-8KHz has excellent smoothness Optimized parameter design, suitable for multiple matching methods Customized rear cavity and bracket, easy to install MP:4 Ω Rated Power:30Watts Peak Power:100Watts SPL:87dB/M/W Rated Freq:600-20KHz Magnet:25*8 neodymium Voice coil:25mm KSV