PRX418S is an eighteen inch subwoofer which, when combined with the two-way models, provides a sub/sat system capable of generating 135 dB of full-range, high quality audio. Features :   Tough DuraFlexT finish enclosure Heavy Duty 16 gauge protective screen backed steel grille   Specifications Frequency Range   :   35 Hz – 250 Hz Frequency Response   :   52 Hz – 120 Hz System Sensitivity   :   95 dB SPL (1w@1m) Power Rating, Pink Noise   :   800 W / 1600 W / 3200 W (Continuous/Program/Peak) Rated Maximum SPL   :   130 dB SPL peak Nominal Impedance   :   8 ohms Dimensions (H x W x D)   :   678 mm x 536 mm x 615 mm (26.7" x 21.1" x 24.2") Net Weight   :   36 kg (79 lbs.)