Presentation and demonstration services, in a store or online via a global computer network, with a view to the sale thereof to the public, for high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor; presentation and demonstration service, via a global computer network and in an augmented reality environment, with a view to the sale thereof to the public, for high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor; retail services in connection with high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor; online retail services in connection with high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor; organization and planning services, for promotional and commercial purposes, for listening to music and sound and audiovisual projection sessions, in a store, with a view to the sale thereof to the public, of high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor; organization and planning services, for promotional and commercial purposes, for listening to music and sound and audiovisual projection sessions, online via a global computer network and in an augmented reality environment, with a view to the sale thereof to the public, of high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor; commercial information and advice for consumers with respect to selection for the purchase of high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor; advice and assistance in business administration and management in connection with the operation of a sales store for high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor.

Installation, servicing, repair, maintenance and troubleshooting of high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor; information and advice with respect to the installation, servicing, maintenance and troubleshooting of high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor.

Technical tests, advice and evaluations concerning the design (engineers' services) of installations and rooms for broadcasting and listening to music, as well as audiovisual and recording studio facilities and rooms; technical testing of high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor; technical advisory services with respect to installation, servicing and repair of high fidelity audio apparatus and instruments, headsets, audio speakers and loudspeakers, preamplifiers and amplifiers, audiovisual equipment and apparatus for processing sound signals as well as for transmission, reproduction, playback and streaming, in progressive or deferred time, of sound or images, of the component parts thereof, including the media and devices for remote control and power supply therefor; drafting technical plans not related to conducting business for the design of facilities and rooms for listening to and broadcasting music, as well as recording facilities and rooms and recording studios; technical consultancy and advisory services in the field of high fidelity audio and audiovisual apparatus, including headsets, speakers, amplifiers, equipment for processing, transmission, reproduction, playback and streaming of sound and images, and related component parts, media, remote control devices, and power supply units.