Apparatus for recording, transmission or reproduction of sound or images; Loudspeakers; loudspeakers in flat panel and picture panel forms; loudspeakers which can be integrated into furniture; digital signage display panels for displaying advertising information and for publicity purposes with integrated or incorporated loudspeakers; loudspeakers which can be integrated into ceiling tiles; loudspeakers incorporated into ceiling tiles; flat panel loudspeakers; loudspeakers, namely, flat panel ...