Power Acoustik NX-3 PRO Audio Tweeter - 200W MAX – Single， 109DB 1W/1 M<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Very Efficient (and Loud!) Horn Loaded Compression Tweeter</li><li>1.75" Aluminum Dome Diaphragm with Phase Inversion Plug</li><li>6dB Crossover Capacitor Included. Freq. Resp 3kHz - 20KHz</li><li>4-Ohm Impedance. Efficiency: 109dB with 1 watt at 1 meter</li><li>100 W RMS ， Sold Individually</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41RBRa8CyIL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51P6U1RLjjL.jpg" noproxy>