JL Audio 10w3v3-4 10-Inch 4 Ohm 300 Watt Rms Subwoofer JL Audio 10W3V3-4 10" 4 Ohm W3 Subwoofer 300 watts RMS (JL Watts) Mineral-filled polypropylene upper cone DMA-optimized, long linear excursion capability Big power even with small sealed or ported enclosures