Yamaha NS-P20 5.1-Channel Home Theater 6 Piece Surround Sound Speaker System with Active Powered Subwoofer Yamaha 5.1-channel Surround Sound Speaker System Frequency Response 30 Hz25 kHz Impedance	6 ohms (without subwoofer) Front Speaker Type Full-range acoustic suspension Driver	7cm (2-3/4) full-range cone Nominal Input Power 30 W Maximum Input Power 100 W Center Speaker	Type	Full-range acoustic suspension Driver	7cm (2-3/4) full-range cone Nominal Input Power 30 W Maximum Input Power 100 W Surround Speaker Type Full-range acoustic suspension Driver	7cm (2-3/4) full-range cone Nominal Input Power 30 W Maximum Input Power 100 W Subwoofer	Type	Advanced YST with Linear Port Driver	16cm (6-1/2) cone Output Power 50 W (5 ohms, 100 Hz, 10% THD) Dynamic Power	100 W