Acoustic measuring systems comprised of apparatus for recording, transmission and reproduction of sound and images, electroacoustic sound transducers, loudspeaker cabinets and loudspeaker installation enclosures, namely, racks for loudspeakers, amplifiers and electronic control apparatus and signal processors for sound amplifiers

Acoustic measuring systems, namely, apparatus for recording, transmission and reproduction of sound and images, electroacoustic sound transducers, loudspeaker cabinets and installation enclosures, amplifiers, and electronic control apparatus and signal processors for sound amplifiers