This Black Diamond Set of 6-inch by 9-inch Coaxial Speakers Deliver 540 Watts of Max Power</br>20 Ounce Magnet and a 25 Millimeter Voice Coil</br>89 Decibels of Sensitivity and a Frequency of 65-20??000 Hertz</br>Injection Cone Woofer?? Mylar Dome Tweeter?? and 2x15 Millimeter Piezo Tweeters</br>Included in this package is a pair of 6"9" four-way 540 watt speakers - carrying the high?? mid?? and low end for a fuller range sound.</br></br>Product Description</br></br>The DS18 Black Diamond Speakers are the top of the line?? of all lines. You wouldn't believe the quality and power of sound this monster delivers. If you are an experienced car audio buyer?? a competitor?? installer?? enthusiast?? or simply if you have what it takes to take it to the top level these are the speakers that you will go to.</br><br/>http://www.amazon.com/gp/product/B00IZZ57NWaan