Immersive logitech 360-degree sound for crystal-clear, room-filling audio ported, down-firing subwoofer delivers deep, rich bass. satellites(height x width x depth): 8.3 x 3.4 x 4.5 inches rca and 3.5 mm inputs for easy connections to gaming console, dvd player or ipod integrated headphone jack for private listening. subwoofer - 18w. total watts (rms) - 30w 30 watt (rms) of power produces big, bold full-range sound