3d home cinema blu ray home cinema system speaker system 21 series harman kardon bdsx80 components 3d blu ray player speaker system speaker types stand speakers small subwoofer audio functions automatic calibration hdmi arc audio return channel supported audio formats mp3 mpeg1 wma sound systems dts dts hd dolby digital dolby digital plus dolby true hd frequency range internet radio video upscale 4k 720p 1080p hd format uhd video functions 2d 3d