Polk Audio DB 675 Eurosized 6.75-Inch Vehicle Speakers (Pair, Black) Pair of "Eurosized" marine-certified coaxial speakers suitable for use in cars, trucks, boats, and other vehicles One 6.75-inch polymer/mica composite cone woofer and one 0.75-inch silk/polymer dome tweeter per speaker Frequency response: 35 Hz to 22 kHz Peak power handling of 180 watts (60 watts continuous) Requires mounting cutout of 5.62-inches in diameter and depth of 2.56-inches