Yamaha NS-SP1600 5.1-Channel Surround Speaker System (Black) (Discontinued by Manufacturer) Satellite speakers have two-way acoustic suspension design with one coaxial two-way driver and one full-range driver All five speakers rated at 100 watts maximum output 100-watt powered subwoofer uses QD-Bass and advanced YST power-bass technologies Features Yamaha's patented Advanced Active Servo Technology System delivers full, powerful, resonant sound waves