The 12" front-firing F-12 powered subwoofer incorporates a high current 475-watt peak amplifier designed by BASH Technology in combination with a 12" injection molded long-throw woofer. A patented BIC "Venturi" vent eliminates port noise which is often heard from other subwoofers, especially when playing demanding music and videos. The F-12 also features an adjustable crossover, adjustable volume control, automatic signal sensing, high level inputs, and both Dolby Pro Logic & Dolby Digital/DTS inputs. Finish-Black Laminate.