Abstract: A stereo loudspeaker system (1) consists of a unitary enclosure (2), the rear wall (3) of which is oriented towards a reflecting wall (13), said enclosure (2) including an even number of low-frequency loudspeakers (15) which are disposed symmetrically in the rear wall (3) at an angle to each other. In addition to the low-frequency loudspeakers, the system includes a number of the loudspeakers (16, 17) which are all housed in the same enclosure (2) and are disposed approximately in the same loudspeaker plane or, at least some of them, in pairs at equal distances therefrom. The reflecting wall (13) can consist of a wall of a listening room or of a reflector belonging to the stereo loudspeaker system and connected to said enclosure.