18-inch pro rider subwoofer, aluminum ribbon wire, polyimide-impreganted fiberglass former, Nomex stiffener, solderless diffusion welded OFHC copper leads.Theseoutstanding drivers have a powerhandling rating of 1,200 Watts program,along with high efficiency, reduceddistortion and excellent overall soundquality. The Pro Rider series uses a new conethat is a variation on the existing Kevlar -impregnated cones used on all BlackWidows. The new cone is stronger andtougher, highly water-resistant and has aspecially designed deep-roll accordionsurround. The dustcap is also made ofthe same extremely strong material. The Pro Rider drivers are superiorchoices for a wide range of soundreinforcement, high level playback,subwoofer and monitor applications.