LASE Replacement 12" Differential Woofer Replacement Upgrade NEODYMIUM Intended For ( 262G) PRX 712, PRX 812, Series 4 Ohms This is a Replacement 12" Differential Low Frequency replacement Transducer compatible with PRX 712; PRX 812; Capable of reproducing full-bandwidth sound at high levels, with neodymium magnet and a pair of inline voice coils in separate magnetic gaps instead of a single voice coil-gap combination. This permits a more effective use of available space, and expedites efficient removal of heat from the motor structure.