Loudspeakers; Megaphones; Microphones; Radios; Transponders; Acoustic amplifiers; Audio equalizer apparatus; Audio interfaces; Audio mixers; Audio- and video-receivers; Cabinets for loudspeakers; CD cases; Compact disc cases; DVD players; Earphones and headphones; Horns for loudspeakers; Sound recording apparatus; Sound transmitting apparatus; Video recorders; Video cassette recorders and players, compact disc players, digital audio tape recorders and players, electronic diaries; Sound amplif...