#speakerUnmoderated tagAll postsTrending CommunitiesLeoFinanceVibesPinmapplePhotography LoversHIVE CN 中文社区SplinterlandsActifitLiketuHive LearnersHive SucreBlack And WhiteHolozing CommunityExplore Communities...#speakerTrendingHotNewPayoutsMutedshahzaibad (45)in FreeCompliments • yesterdaySpeakerSpeaker A loud speaker is mainly composed of a permanent magnet a coil and a vibrating cone. One side of coil attached with the cone and its other side lies near the permanent magnet. When electric current