3-Way speaker design?? 6-1/2"Multi Layered Mica Cellular Reinforced Woofers?? 1 7/16"Polyester Main Tweeter?? 1/4"Piezo Super Tweeter for extended high-frequency response</br>Perfect compatibility with Sony MEX-XB head units?? Power Bass Response w/(50 -24??000 Hz) Effective Frequency Range</br>4 ohm Speaker Impedance?? 350 W Max Power Handling?? 60 W Rated Power Handling</br></br>Product Description</br></br>Let your music loose with Sony XB speakers. When paired?up to a MEX-XB100BT head unit?? these speakers complete with beefy internals?? rigid MRC woofer cones?? and smooth and natural high-end will deliver really BIG sound.</br><br/>http://www.amazon.com/gp/product/B00RXIHLNGaa