Abstract: A sound system for use with a non-acoustically transparent video screen (1) is disclosed, comprising at least one loudspeaker enclosure (10) comprising a loudspeaker (15) arranged so that the main direction of propagation of the sound (33) which it emits is directed towards said screen, the sound being reflected by the surface of the screen towards an audience (2). The enclosure (10) further comprises a second sound emitter (16/20) situated at the rear of said loudspeaker (15), whereby the loudspeaker enclosure has a directivity of the cardioid type.