I am selling a Logitech X-540 speaker system, hardly used - everything is functional. An agreement is possible with quick negotiations.Frequency Directed Dual Driver (FDD2) technology provides a uniform sound field anywhere in the room.Thanks to the Matrix mode, it is possible to create a 5.1 surround sound effect from two-channel stereo sources.The speaker for the center channel can be connected to most LCD monitors.The satellite speaker stands can be rotated and easily attached to the wall.A dynamic bass equalizer enhances the quality of the bass transmission in real time and reduces distortion.A high frequency response subwoofer with a bass reflex hole and radiating into the ground moves more air and provides deeper bass.The total volume control, subwoofer control and Matrix button are conveniently accessible on the control center.With headphones connected, you can enjoy music and games in complete privacyImmerse yourself in the game thanks to the exceptional surround sound of Logitech's X-540 speaker system.FDD2™ satellite dual driver technology eliminates uneven responses and Matrix mode creates a 5.1 surround sound effect from two-channel stereo sources.The new innovative speaker for the center channel can be attached to the top of most LCD displays.Package contents: 4x satellite speakers, 1x central speaker, 1x subwoofer, control unit, cables