Eight-inch marine subwoofer delivers 300 watts peak power (150 watts RMS) at 4 ohms * UV-treated poly cone with Kapton voice coil former, rubber surround * Salt fog and UV tested, with nickel-plated speaker terminals and stainless steel hardware * Accessories let you liquid cool voice coil motor assembly for maximum power handling capability * 20 Hz - 250 Hz frequency range; 87dB sensitivity