Full 4.1 surround sound multimedia system for a full rich sound field during music, movies and games. Easy to use controls. Clear and clean 2.1 provides an extraordinary musical stage for CDs and MP3s. The volume control is located on the right front satellite. The bass and treble controls are located on the front of the subwoofer. The powerful subwoofer utilizes an APG; Technology port design and a MAGNUM; transducer that provides clean low bass. The JBL Invader system is compatible with all analog stereo and multi-channel soundcards, laptops and MP3 players. A multi-channel soundcard is recommended for best effects. Experience the surround sound difference.