Powerbass S675 6.75-Inch Coxial OEM Speakers 135 Watts peak power handling 4-Ohm nominal impedance 87db efficiency Paper cone woofer with DDC coating - Dynamic Damping Coating 0.75" pure silk dome tweeter Two 6.5" thin Coaxial 2-way speakers with mesh grill 63Hz - 20Khz Frequency response Unique basket design is GM compatible for 6.5-Inch to 6.75-Inch locations 150 Watts peak power handling 4-Ohm nominal impedance 63Hz - 20Khz Frequency response and 89db efficiency Paper cone woofer with DDC Dynamic Damping Coating and pure silk dome tweeter Mounting depth 1.75 inches and driver cut out 5.1875 inches Kit includes speaker wire - mounting hardware - application guide and PowerBass decal