AMPLIFIED HOME CINEMA 2-WAY SURROUND LOUDSPEAKER Surround Be features an exclusive "Bi/Twin" design with twin inputs, enabling the loudspeaker to be used both in 5.1 (Bipolar mode) or 7.1 (double mono mode). This feature avoids having multiple surround loudspeakers in your Home Cinema. Surround Be is composed of: 2 x 61/2" (16.5cm) "W" cone bass/midrange 2 x pure Beryllium inverted dome tweeters