51 speaker system transmission mode cable number of speakers 6 components 1x subwoofer 2x surround 1x centre 2x front impedance 8 ohm front speaker types closed full range system front enclosure 1x 75mm midrange speaker power handling capacity front 50 watt frequency range front 150 20000 hz dimensions front wxhxd 133 x 95 x 94 mm front weight 063 kg central speaker type closed central enclosure 1x 75mm midrange speaker power handling capacity cen