6 x 9″ 3-Way Speaker</br>12mm Aluminum Dome Midrange</br>Aluminum Voice Coil</br>Heavy Gauge Steel Stamped Basket</br>Butyl Rubber Surround</br></br>Product Description</br></br>6 x 9" 3-Way Speakers / 425 Watts.  TSD Coated Pressed Paper Cone.  Nominal Impedance: 4 Ohms.  Speaker Sensitivity: 92dB.  Frequency Response: 30Hz - 20kHz.</br><br/>http://www.amazon.com/gp/product/B005MAH3L2