Upgrade your marine audio system with this comprehensive bundle featuring 4 Kicker 51MWF104 10-inch Premium Marine Subwoofers and 1 Kicker 48KMA8001 Weather-Resistant Mono Sub Amplifier. The 51MWF104 Subwoofers are designed for free-air applications, delivering powerful and reliable bass performance without the need for an enclosure. Featuring water-proof connections, a weather-resistant polypropylene cone, and RGBW LED lighting, these subwoofers are perfect for marine environments. The Kicker 48KMA8001 Amplifier is a true marine-grade powerhouse, with 800 watts of power and marine-specific features like conformal-coated circuit boards and marine-grade speaker terminals. Designed to withstand the elements, this amplifier also includes 0-6dB variable bass boost and built-in variable crossovers for optimal performance. Elevate your audio experience on the water with this top-of-the-line marine audio bundle. Dimensions: Subwoofers - 10-inch woofer, 4-ohm impedance, Mounting Hole Diameter 9-1/16", Mounting Depth 5-3/16", Amplifier - 2-5/16" H, 6-11/16" W, 8-1/16" L.