BF?20 4〝2-Way car speaker 102?02mm Rubber edge woven cone woofer 40mm Pet dome tweeter Impedance:4 ohms Sensitivity:88dB Norpower:40w Maxpower:80w Frequency:90HZ-20KHZ Voice coil: dia 25mm ASV MAGNET:70?2?5 Y25 4'',5'',6'',6*9''