Computer peripheral apparatus; Distribution amplifiers for audio and video signals; Electric cables and wires; Electrical cables for musical instruments; Electrical connections; Electronic interconnecters for audio and video signals; Encoding and decoding apparatus and instruments; Fibre-optic cables; Horns for loudspeakers; Karaoke players; Matrix switchers for audio and video signals; Optical fibres; Optical fibres, telephone receivers, switchboards, telephone and telegraph wires, video tel...