Wifi speaker bluetooth speaker series harman kardon omni power rating 25 watt effective output 50 watt system 1 way system speaker system 10 mono principle active frequency response 52 20000 hz sensitivity 80 dbmw noise level 80 db amplifier type digital power supply mains operation colour black function streaming control feature bluetooth pairing number of tweeters 1 treble chassis 35 mm number of subwoofers 1 bass chassis 90 mm ana