Abstract: The loudspeaker enclosure (10) comprises a central channel (16) turned toward the listener, and left and right side channels (18L, 18R) oriented perpendicular to each other. The signal to be reproduced is separated into: i) a mono component correlated between the left and right signals; ii) left and right surround components decorrelated between the left and right signals; iii) a left component decorrelated between the mono component ant the left signal; and iv) a right component decorrelated between the mono component ant the right signal. The central channel and the side channels are piloted by combinations of these components according to a distribution that is a function of the mode of use of the loudspeaker enclosure, alone in front of a listener and as a pair in association with another similar loudspeaker enclosure, the two loudspeaker enclosures being arranged on the left and on the right of the listener.