Apparatus for broadcasting, recording, transmission or reproduction of sound or images; [ Apparatus for transmission of communication; ] Apparatus for wireless transmission of acoustic information; Audio-receivers and video-receivers; [ Audio-video receivers; Audio interfaces; Audio mixers; Bullhorns; Cabinets for loudspeakers; Data processing equipment, namely, couplers; Earphones; Equalisers being audio apparatus; Loudspeakers; Musical instrument adaptors; Personal stereos; Plug adaptors; ]...