Scientific, photographic, cinematographic, optical, weighing, measuring, signaling and checking apparatus and instruments; data processing apparatus and computers; transmitters and receivers for telecommunications; computers; apparatus for recording, transmitting, reproducing or processing sound or images; magnetic recording media, acoustic or optical disks, floppy disks; computer software, recorded; computer peripheral devices; apparatus, instruments, devices, units and equipment for public address, broadcasting, pick-up and transmission of sound, and, particularly, loudspeaker cabinets and component parts thereof, acoustic reflectors and dampers; sound vibration generators; loudspeakers and component parts thereof; loudspeakers fitted with integrated amplifiers and component parts thereof; amplifiers and component parts thereof; loudspeaker cabinets and component parts thereof; omnidirectional loudspeaker cabinets and component parts thereof; electronic control units for regulating audio signals; electric and electronic apparatus and instruments for analog, digital or optical reception, processing, reproduction, regulation or distribution of audio or visual signals; television sets and screens and component parts thereof, radio receivers and component parts thereof, automobile radios and component parts thereof; CD, minidisk and mp3 readers and writers, compact disk players, DVD players, video recorders and component parts thereof; headphones and component parts thereof; audio and video cables