POWER HANDLING, PEAK : 350 MAGNET STRUCTURE : 50 Oz IMPEDANCE : 4 OHM FREQUENCY RESPONSE : 60HZ-20KHZ SPL 1 WATT/1 METER : 92dB CONE MATERIAL : POLY INJECTION VOICE COIL : 1" ALUMINUM TWEETER : 1" MYLAR DOME GRILLES : PLASTIC