This Neodymium Bullet Tweeter features a Mylar diaphragm for low distortion and extended high frequency response ^^ Built-in capacitors act as a crossover and attenuates the low frequencies for smooth frequency response ^^ Able to take a ton of power! Up to 150 watts RMS of power handling EACH ^^ Designed to add high output, high frequency response to any large system ^^ Producing a sensitivity of 109 dB 1W/1m this tweeter can keep up with even the most efficient sound systems.