Not much evolution for the high end surround speaker Electra SR 1000 Be that benefits from the 3 third "W" cone generation. But its exclusive "Be/Twin" structure with dual input permits to use the SR 1000 Be as well as in a 5.1 system (in bipolar mode) as in a 7.1 (in dual mono mode) without increasing the number of effect loudspeakers in the Home Theatre room.