These Orion Audio Cobalt series flush mount 4 ohm tweeters are a great solution when it comes to sound quality and value. Orion Car audio delivers it all with these 200 watt max power dome tweeters. These feature a sleek looking design and a in-line crossover network and are powered by a neodymium magnent. 50W RMS / 100W Nominal / 200 Watts Max Music Power Frequency Response: 2.0KHz-20KHz / Sensitivity: 90.8dB (1W/1M) 4 Ohm Impedance