The GSS10 Garden Series Subwoofer by Niles is designed to extend the listening environment into the outdoors, bringing deep, rich bass from a subwoofer that disappears into the landscaping. Powerful, Invisible Bass Complete with a 10” woofer cone in its interior, this powerful in-ground subwoofer effectively extends the listening environment with deep rich bass and with the ability to bury the subwoofer underground, leaving only its fully paintable port tube visible on the surface, the GSS10 is the perfect solution to add bass without visible space. Superior Construction The Niles GSS10 is made from industrial strength uPVC, the same type of material used in modern underground plumbing and irrigation systems. When properly installed, the GSS10 will provide you with years of listening pleasure.