diffusore da esterno polk audio atrium300satCompact outdoor speaker It can be planted in your garden, hung from the ceiling or eaves, or installed anywhere you want to mix big sound with the great outdoors. The acoustically matched two way design delivers dynamic sound on its own or blends seamlessly with the Atrium Sub100, even in wide open spaces. Withstands the elements for years thanks to its mineral filled polypropylene housing, 1 mm aluminum grille and stainless steel hardware. Dynamic