Downward firing 4-1/4 full range driver.Dimensions-Each speaker:36 cm H x 32 cm W x 32 cm D Innovative radial design disperse sound in a 360 degree pattern and centrally located port enhances low-frequency performance to deliver the depth and richness of music outdoors Rugged, flexible design withstands temperatures from -40 to +150 degrees Fahrenheit, and passed the rigorous salt fog test 66% longer than required by the Marine Industry Standard