4x6" Coaxial Car Speaker Pair Kicker's CS speakers deliver remarkable performance at a price point that doesn't break the bank. Polypropylene cones and ribbed polyester foam surrounds work together for precise acoustics and tremendous reliability. Details: 2-way 4"x6" speakers (pair) Polypropylene woofer cone Polyester foam surround 1/2" PEI balanced dome tweeter 2-50 watts RMS (150 watts peak power) Frequency response: 50-20,000 Hz Sensitivity: 88 dB Top-mount depth: 1-3/4"