Hifonics ASW12D4 Atlas Vehicle Subwoofer Heavy duty ABS trim ring to keep installations clean. Satin black linear Butyl rubber surround along with the Atlas spider helps keep the piston motion of the subwoofer linear and smooth. Heavy Duty injection molded polypropylene cone adds strength to bass energy. Nickel-plated 8 gauge P&I (push and insert) speaker terminals to secure MAXXLINK speaker wire connections easily. 12" DVC 4 Ohm subwoofer 400 watts RMS 800 watts MAXX