Pioneer TS-A301D4 12" Subwoofer with dual 4-ohm voice coilsBring your tunes alive I don't think it's an exaggeration to say that a good sub will make your car's sound system come alive, and Pioneer's Champion Series subs provide the deep low frequency punch to make it happen. The TS A301D4 12" subwoofer handles up to 500 watts RMS while pumping out loud, clean bass. This sub features Pioneer's Honeycomb IMPP cone for exceptional strength and a dual layer, fiber and reinforced elastic surround that supports