The W2-125 subwoofer is a high output, high sensitivity, vented low frequency system with solid low frequency response down to 30 Hz. It includes two 15" cast-frame, carbon-fiber, double-spider, Ferrofluid cooled speakers mounted to a vented enclosure. Engineered for use in permanent installations, the loudspeaker enclosure and faceplate are constructed of multilayer glass composite, providing extreme structural strength. A three-layer WeatherStop grille provides weather-resistance to the internal components, while all exposed hardware is stainless steel or powder-coated aluminum extrusion. Six 1/2-13 mounting points are included.