Microphones, AM-FM tuners, tape recorders, record players, capsules for reproduction and recorders, integrated electronic circuits, electronic sound filters, recorded circuits, sound mixers, household and industrial electronic sound amplifiers, loudspeakers in general, housings for loudspeakers, acoustic baffles, speaker columns, amplified speaker columns, controls for controlling and regulating sound, amplified baffles (integrated amplifier), sound transmission apparatus for musicians, electronic apparatus for echo effects, television apparatus, apparatus for telecommunication by radio relay cables, electronic apparatus in general, accessories and connectors for all the said apparatus