DESC: Immerse yourself in full, smooth 5.1 surround sound with the Logitech X-540 speaker system. The X-540 sports a unique, “Matrix Mode” that allows you to transform 2-channel stereo sources into full 5.1 surround sound. Listening to your favorite CDs with all speakers firing at the same time can be a religious experience. Real-time bass equalization maximizes performance while minimizing distortion. Plug and play functionality makes the X-540 simple to connect to a variety of sources including PCs and MP3 players.