Abstract: The present invention relates to a system for generating within a relatively small enclosed space a sound field corresponding to that in a relatively large enclosed space having specific acoustic characteristics, said system including an input unit adapted to receive at least one primary electric audio signal, the output of which is connected to the input of a signal processing unit having a number (N) of secondary channels, each provided with signal processing means with selectable delay time and selectable gain constant, the N outputs of said channels being intended to produce N secondary electric audio signals, each to be supplied to one of N secondary loudspeaker units placed in said relatively small enclosed space in preselected positions. The invention proposes a system of a kind as mentioned above and comprising a programmable memory for storing parameter groups representative of a number of various relatively large enclosed spaces, i.e.