Loudspeakers; audio apparatus and equipment, namely, audio mixers and audio amplifiers; cabinets adapted for use with loudspeakers; loudspeaker stands; loudspeaker housings, loudspeaker systems, control apparatus and equipment therefor, namely, remote controls for loudspeaker systems; electronic controllers for loudspeakers; amplifiers; sound reinforcement apparatus, namely, stereo receivers and signal processors; sound delivery systems comprising loudspeakers and amplifiers; crossover networks, namely, a filter in a loudspeaker unit that divides the signal and delivers different parts to bass and treble speakers; apparatus and instruments for recording, transmission or reproduction of sound; microphones; sound reverberation units, namely, loudspeakers and subwoofers; apparatus for amplifying, reinforcing, mixing, modifying, controlling and disseminating sound, namely, sound amplifiers, sound mixers and audio mixers; controls for apparatus and instruments for recording, transmission or reproduction of sound; downloadable computer software for amplifying, reinforcing, mixing, modifying, controlling, and disseminating sound for use in conjunction with loudspeakers, loudspeaker systems, amplifiers; structural parts and fittings sold as a unit therewith for the aforementioned goods