Earphones; Loudspeakers; Megaphones; Microphones; Subwoofers; Acoustic membranes; Amplifiers for musical instruments; Audio-video receivers; Cabinets for loudspeakers; Headphones in the form of headbands; Horns for loudspeakers; Internet radios; Pickups for telecommunication apparatus; Portable media players; Portable radios; Radio sets; Sound recording apparatus; Sound transmitting apparatus; Tape recorders; Telephones incorporating intercommunication systems