Definitives bipolar surround speakers are simply the best available. Each is a true bipolar system containing two complete full-range speaker systems, angled on each side of the cabinet. Bipolar technology is absolutely superior for surround speakers because it synergistically combines the performance advantages of direct radiating (imaging, focus, localization, and specificity) and dipolar speakers (spacious, all-enveloping ambiance) into one ideal system (with wide dispersion which delivers superb sound for every listener) which is perfect for all discrete 5.1, 6.1, 7.1 music and movie formats including Dolby Digital AC-3, DTS as well as the new Dolby EX, Dolby Pro-Logic, DVD Audio and SACD. Video Magazine raved: "They make all the difference in the world...you feel like youre part of the movie." Widescreen Review said our bipolar rears, "provide spacious surround envelopment as well as the directionality in the surrounds that the best 5.1 discrete material [music and movies] calls for."