Precision Power SN.8 240W 8-Inch Sedona Series Single 4 Ohm Subwoofer, Set of 1 Power Handling: Peak: 600 watts/RMS: 240 watts Polypropylene cone: Poly-cotton suspension spiders & Polly conical cone dust-cap Nickel plated 8 gauge compression terminals Resonance Frequency (Fs): 47 Hz Sensitivity: 85dB