Loudspeakers; time delay reverberation (terms considered incomprehensible in the opinion of the International Bureau - Rule 13;2)b) of the Common Regulations); cabinets for loudspeakers; microphones; radios; sound recording apparatus; video disc players

Amplifiers; Cabinets for loudspeakers; Electronic sound mixing, processing and synthesizing apparatus; Loudspeakers; Microphones; Radios; Tape recorders; Video disc players