BIC America F12 12-Inch 475-Watt Front Firing Powered Subwoofer Powered subwoofer with 12-inch injection molded long throw woofer; BASH designed amp Patented BIC "Venturi" vent eliminates port noise Adjustable crossover, adjustable volume control, automatic signal sensing Inputs for both Dolby Pro Logic and Dolby Digital/DTS Backed by 5-year warranty