Onkyo SKS-HT540 7.1 Channel Home Theater Speaker System 7.1-channel home theater speaker set 130 watts total output on 2-way bass reflex front, center, and surround speakers. 230 Watt powered Subwoofer with Auto-Standby/On Circuitry and Output Level Control Front and center 2-way speakers feature 5-inch diaphragm woofers and 1-inch balanced floating tweeter Bass reflex powered subwoofer with 230 watts output Subwoofer construction includes a 10-inch cone driver