Pioneer TS-A301S4 12" 4-ohm component subwooferRolling in the deep Pioneer's Champion Series subwoofers are made to give you the deep, powerful lows you expect from Pioneer. The TS A301S4 12" subwoofer handles up to 500 watts RMS RMS and features an injection molded polypropylene cone that's impregnated with glass fibers and mica for exceptional precision and strength. An elastic polymer reinforced fiber surround supports the woofer during cone excursion to give you accurate, hard hitting bass