51 speaker system series bose acoustimass colour white transmission mode cable number of speakers 6 components 5x satellite 1x subwoofer 2x surround 1x centre 2x front impedance 4 8 ohm front speaker build type satellite speaker front speaker type wall mountable dimensions front wxhxd 83 2 x 95 5 x 84 9 mm front weight 054 kg central speaker types same as front speaker wall mountable music handling capacity centre 560 watt dimensions centre wxhxd