51 speaker system mains switch series harman kardon hkts transmission mode cable number of speakers 6 components 1x subwoofer 2x surround 1x centre 2x front impedance 8 ohm front speaker types 2 way magnetically shielded front enclosures 2x 75mm midrange speaker 1 x 19mm tweeter music handling capacity front 120 watt power handling capacity front 10 watt frequency range front 45 20000 hz dimensions front wxhxd 110 x 299 x 88 mm front weight 15 kg