8 subwoofer with dual 2-ohm voice coils. Square SoloKonT polypropylene cone with Santoprene rubber surround. Power range: 50-450 watts RMS (225 watts per voice coil). Peak power: 900 watts. Frequency response: 28-100 Hz. Sensitivity: 83.6 dB. Sealed box volume: 0.33-0.75 cubic feet. Ported box volume: 0.66-1.0 cu.