PowerBass S-693 6 x 9-Inches 3-Way Coaxial Speaker Set (pair) 2 Two Way 6x8" Coaxial speakers are included Woofer features DDC coating .075" Pure silk dome tweeter 56Hz -20Khz Frequency response 4-Ohm Nominal impedance 88db efficiency and 180 Watts peak power handling Woofer features paper cone with DDC coating 0.075-Inch PEI Tweeter and 2.0-Inch PEI Midrange 210 Watts peak power handling 4-Ohm nominal impedance 90db efficiency Mounting depth 3.37-Inch driver cutout 6 x 8.75-Inch grill height 1-Inch 45Hz - 20Khz Frequency repsonse Complete kit includes mesh wire grills speaker wire mounting hardware application guide and official PowerBass decal