Audio interfaces; Audio- and video-receivers; Cabinets for loudspeakers; Cases for smartphones; Covers for smartphones; Ear pads for headphones; Headphones; Horns for loudspeakers; Loudspeakers; Megaphones; Microphones; Mobile telephones; Portable media players; Protective films adapted for smartphones; Smartphones; Sound recording apparatus; Sound reproduction apparatus; Subwoofers; Televisions; Virtual reality headsets