Audio equipment, namely, audio mixers; Audio apparatus, namely, audio equalizer apparatus; Audio electronic apparatus, namely, audio mixers, electronic sound mixing, processing and synthesizing apparatus for use in connection with loudspeakers; audio processing apparatus; audio frequency apparatus, namely, frequency receivers, frequency amplifiers, frequency converters, frequency meters and frequency synthesizers; audio amplifiers; loudspeakers; loudspeaker systems; audio speakers; speaker enclosures; public address speaker systems; sub-woofers; portable sound reproducing apparatus; amplifiers; apparatus for the reproduction of sound, namely, loudspeakers; apparatus for recording sound; monitors, namely, studio monitors in the form of loudspeakers; monitoring instruments, namely, sound monitoring systems in the nature of loudspeaker systems; audio equalizers; sound level meters; high fidelity apparatus, namely, high fidelity audio monitoring loudspeakers, two-way audio monitoring loudspeakers, three-way audio monitoring loudspeakers, audio monitoring sub-woofers, studio monitors, stereos, audio amplifiers, microphones, electronic frequency converters and audio receivers; high fidelity audio apparatus in the nature of high fidelity audio monitoring loudspeakers and sub-woofers; hi-fi audio sound systems, namely, surround sound systems; calibrators for calibrating loudspeakers and loudspeaker systems; calibrating apparatus for calibrating loudspeakers and loudspeaker systems; control amplifiers; automatic remote control apparatus, namely, sound controllers for use in connection with loudspeakers; network controlling apparatus, namely, electronic sound controllers for use in connection with loudspeakers; electronic control systems comprising electronic sound signal processors for use in connection with loudspeakers; voice processing systems, namely, digital voice signal processors for use in connection with loudspeakers