Method of processing and reproducing an audio stereo signal and an audio stereo signal reproduction system

An audio stereo signal reproduction system, suited for reproducing an audio stereo signal, comprising:

• a pair of loudspeaker units (2′, 2″) acoustically isolated from each other, the units (2′, 2″) sharing a common front surface (5) and having an effective sound propagation direction being essentially orthogonal to the front surface (5), and loudspeaker elements of said pair of loudspeaker units (2′, 2″) being identical to each other,
• wherein the loudspeaker units (2′, 2″) of said pair are positionable as a unitary assembly in close proximity to each other, and the corresponding loudspeaker elements of each pair of loudspeaker elements (3′, 3″) of the two units (2′, 2″) are mounted at essentially the same height, and in immediate vicinity of each other,
• wherein an input audio stereo signal of the system includes at least a part of the frequency range of a mid signal (M) and a side signal (S), and an output audio stereo signal is intended for reproduction by the pair of loudspeaker units,
• wherein the side signal (S) is split into a first (S′) and a second (S″) intermediate signal where said first intermediate signal (S′) is equal to the side signal (S) and said second intermediate signal (S″) is equal to said first intermediate signal(S′) phase shifted 180°,
• the mid signal (M) is attenuated by a factor a which compensates for imperfections in the balance between the mid (M) and side signals (S) appearing in the audio reproduction stage, and
• the attenuated mid signal to both of said first and second intermediate signals (S′, S″), are added so as to form said output audio stereo signal.