The Logitech Z506 5.1 Channel Surround Sound Speakers and Subwoofer is a powerful, versatile audio system, sure to enliven your music, movies, or games. This 75W system delivers 5.1 Surround Sound through a combination of one ported, down-firing subwoofer and five satellite speakers. In terms of satellites, you will have two for the front of your room, two for the back, and one to be placed front and center. While that arrangement of satellite speakers ensures rich surround sound for higher and mid-range frequencies, you'll have the added bass "oomph" of the subwoofer. With its down-firing driver, bass is bounced off the surface on which the subwoofer sits and spreads throughout the room. Not to mention, the subwoofer also has an adjustable bass knob, so if you're shaking the windows and furniture too much, you can always turn it down. Specifications: Total Watt (RMS)- 75 W Subwoofer- 27 W Center Channel- 16 W Satellites- 4 x 8 W Six-channel direct- 1 3.5 mm input- 1 RCA input- 1 Headphone jack- 1 Controls - Power, volume control and headphone jack on right front speaker; bass control on back of subwoofer