Definitive Technology ProCinema 6D 5.1 Compact Surround Sound System5.1 channel high-performance compact surround sound system delivers full-range audio for movies and music1 annealed aluminum dome tweeters for crystal clear highs and detailed stereo imagingBDSS Mid-Bass drivers deliver superior mid-range detail and punchier bassLinear Response Waveguide extends both on- and off-axis frequency response, while improving dispersion imaging.he Definitive Technology ProCinema 6D 5.1 channel high-performance compact surround sound system delivers fu