4 · Society, Civilization, Culture
46 · social and economic life, transport and communication
46E · post, telegraph and telephone; means of communication
46E6 · electrical and electronic means of (tele)communication
46E65 · phonograph, gramophone; playing recorded sound or video
46E653 · accessories for audio and video players
46E6531 · audio accessories
46E65312 · loudspeaker