Apparatus for recording, transmission or reproduction of sound; loudspeakers; wireless loudspeakers; loudspeakers with built-in amplifiers; loudspeaker units; audio apparatus; wireless audio system, namely, apparatus for wireless transmission of acoustic information; audio speakers; tweeters; ribbon tweeters; bass unit for speakers; woofers, subwoofers; amplifiers; audio and infrasonic transducers; planar magnetic transducers; telecommunication drivers being parts of telecommunication equipment; audio headphone drivers being parts of headphones; compression drivers being parts of audio equipment; headphones; earphones; portable audio systems comprised of transducers, speakers, tweeters, woofers, subwoofers, apparatus for transmission of sound or amplifiers; sound amplifying receivers; wireless audio systems comprised of transducers, speakers, tweeters, woofers, subwoofers, apparatus for transmission of sound or amplifiers; wireless audio system, namely, apparatus for wireless transmission of acoustic information; wireless audio speakers; audio speakers for computers; sound bars; wireless audio equipment, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; public address (pa) systems and instruments; line array systems composed of loudspeakers, amplifiers and audio drivers; sound systems composed of remote controls, amplifiers, loudspeakers and components therefor; remote control units for loudspeakers; distribution system consisting of acoustic waveguides; horns for loudspeakers; electro-mechanical actuators; acoustic couplers; acoustic lenses for loudspeaker horns; cabinets for audio equipment and loudspeakers; loudspeaker modules comprised of acoustic enclosures for projecting sound, audio waveguides, loudspeakers, and electronic cables and connectors for use in audio systems that consist of loudspeakers, tweeters, woofers, subwoofers, or apparatus for transmission of sound; computer peripheral devices; electrical inductors; electric wire and cable; silicon wafers for semiconductors; software drivers as intermediaries between operating system and devices; telecommunications drivers being parts of telecommunications equipment; computer display monitors including touchscreen; electro-dynamic apparatus for the remote control of signals; phototelegraphy apparatus; automatic measuring machines; micrometer gauges; electronic indicator boards; branch boxes [electricity]; optical apparatus and instruments; electric apparatus for commutation; electric buzzers; battery boxes; microphones