A sound reproduction system comprising: an array consisting of individual speakers having flat shapes, the array being formed in the shape of a square and comprising a two-dimensional array consisting of a first two-dimensional sub-array and a second two-dimensional sub-array which have a further line array of flat-shaped individual speakers arranged between them in the form of a central array column of the array; frequency-separating means for providing a high-pass signal via a highfrequency tone path and a low-pass signal via a low-frequency tone path , the high-pass signal being used for controlling the further line array and the low-pass signal being used for controlling the first and second two-dimensional sub-arrays , all of the individual loudspeakers of the first and second two-dimensional sub-arrays being wired such that they are controlled via the low-frequency tone path by means of control signals that exhibit no mutual phase-shift apart from different line lengths, no phase shifter existing between the individual speakers of the first and second two-dimensional sub-arrays and a driver output of the low-frequency tone path , and the individual speakers of the first and second two-dimensional sub-arrays being configured to provide low-frequency tone range in a multi-way system; and a flat housing accommodating the individual speakers , the flat housing comprising a front wall, a rear wall, and a side wall, wherein the flat housing has a depth of less than 5 cm, or wherein a diaphragm diameter of a individual speaker of the two-dimensional sub-arrays is smaller than 5 cm, wherein a distance smaller than 5 mm exists between edges of the individual speakers that are mutually adjacent, and wherein a number of the individual speakers ranges from 9 to 49. an array consisting of individual speakers having flat shapes, the array being formed in the shape of a square and comprising a two-dimensional array consisting of a first two-dimensional sub-array and a second two-dimensional sub-array which have a further line array of flat-shaped individual speakers arranged between them in the form of a central array column of the array; frequency-separating means for providing a high-pass signal via a highfrequency tone path and a low-pass signal via a low-frequency tone path , the high-pass signal being used for controlling the further line array and the low-pass signal being used for controlling the first and second two-dimensional sub-arrays , all of the individual loudspeakers of the first and second two-dimensional sub-arrays being wired such that they are controlled via the low-frequency tone path by means of control signals that exhibit no mutual phase-shift apart from different line lengths, no phase shifter existing between the individual speakers of the first and second two-dimensional sub-arrays and a driver output of the low-frequency tone path , and the individual speakers of the first and second two-dimensional sub-arrays being configured to provide low-frequency tone range in a multi-way system; and a flat housing accommodating the individual speakers , the flat housing comprising a front wall, a rear wall, and a side wall, wherein the flat housing has a depth of less than 5 cm, or wherein a diaphragm diameter of a individual speaker of the two-dimensional sub-arrays is smaller than 5 cm, wherein a distance smaller than 5 mm exists between edges of the individual speakers that are mutually adjacent, and wherein a number of the individual speakers ranges from 9 to 49. <EOS>