Handles up to 1000W peak power (250W RMS) For rich sound. 35 - 200Hz frequency response For accurate sound reproduction. 90dB sensitivity Picks up the highs and lows for faithful sound reproduction. 11" mounting diameter; 6" mounting depth For a proper fit. 12" passive subwoofer Delivers authoritative bass. 4 ohms impedance Conducts power to keep speakers working at optimal levels.