Acoustic conduits; Apparatus for broadcasting, recording, transmission or reproduction of sound or images; Apparatus for recording, transmitting and reproducing sound and images; Audio-receivers and video-receivers; Audio equaliser apparatus; Audio interfaces; Audio speakers; Earphones; Insulated copper wire; Loudspeakers with built in amplifiers; Microphones; Portable media players; Protective cases for smartphones; Subwoofers; Telephone wires