Kicker 11KS525 5-1/4" KS-Series 3-Way Coaxial Speakers - Pair (Black) 2-way 5-1/4 speakers (pair) Polypropylene woofer cone with Santoprene surround 3/4 titanium dome tweeter Power range - 6-45 watts RMS (135 watts peak power) Frequency response - 45-21,000 Hz