Modular audio/video entertainment system, said system comprising three modules: a screen unit, a loudspeaker unit and a control unit, wherein means are provided for assembling and disassembling the modules (10,20,30), wherein said means comprise one or more bracket assemblies (60,64), wherein one end of the one or more bracket assemblies (60,64) is fastened in the loudspeaker unit, and another end of the one or more bracket assemblies (60,64) engages fastening means provided on the rear or bottom side of the screen unit, and wherein the loudspeaker unit has a front surface having first width and a first height, where one or more loudspeaker transducers are arranged for emitting sound from said front surface, a first bottom surface and first top surface and two first side surfaces connected to said front surface defining a first depth and wherein said screen unit has a front screen surface, said front screen surface having a second width and a second height, and second bottom, second top and two second side surfaces connected to said front screen surface defining a second depth, and wherein the control unit has a front surface having a third width and a third height, and third bottom, third top and two third side surfaces connected to said front surface defining a third depth, wherein the control unit and the loudspeaker unit is one integrated member, wherein the upper part of the integrated member comprises a first mounting bracket (61,62' or 65,65') being part of the one or more bracket assemblies (60,64), said mounting bracket (61,61') has means for being fastened to an interface bracket, which interface bracket is provided with further mounting means which are especially provided as corresponding to the fastening means provided in the back side of a screen unit, such that the interface bracket adjusts the difference between the fastening means provided in the back of a screen and the mounting brackets (61, 61') provided on the integrated unit or wherein said mounting bracket (65,65') has one or more mounting surfaces, wherein the mounting surfaces are provided with means for engaging the rear and/or bottom side of a screen unit, wherein different mounting brackets having different means for engaging the rear or bottom side of different screen units on their respective mounting surfaces, may be fastened on the upper part of the integrated member characterised in that the upper surface of the loudspeaker unit is provided with a groove or ridge, in which groove or against said ridge the screen unit is placed, in order to obtain a fixed and common mounting plane between the loudspeaker unit and the screen unit. a screen unit, a loudspeaker unit and a control unit, wherein means are provided for assembling and disassembling the modules (10,20,30), wherein said means comprise one or more bracket assemblies (60,64), wherein one end of the one or more bracket assemblies (60,64) is fastened in the loudspeaker unit, and another end of the one or more bracket assemblies (60,64) engages fastening means provided on the rear or bottom side of the screen unit, and wherein the loudspeaker unit has a front surface having first width and a first height, where one or more loudspeaker transducers are arranged for emitting sound from said front surface, a first bottom surface and first top surface and two first side surfaces connected to said front surface defining a first depth and wherein said screen unit has a front screen surface, said front screen surface having a second width and a second height, and second bottom, second top and two second side surfaces connected to said front screen surface defining a second depth, and wherein the control unit has a front surface having a third width and a third height, and third bottom, third top and two third side surfaces connected to said front surface defining a third depth, wherein the control unit and the loudspeaker unit is one integrated member, wherein the upper part of the integrated member comprises a first mounting bracket (61,62' or 65,65') being part of the one or more bracket assemblies (60,64), said mounting bracket (61,61') has means for being fastened to an interface bracket, which interface bracket is provided with further mounting means which are especially provided as corresponding to the fastening means provided in the back side of a screen unit, such that the interface bracket adjusts the difference between the fastening means provided in the back of a screen and the mounting brackets (61, 61') provided on the integrated unit or wherein said mounting bracket (65,65') has one or more mounting surfaces, wherein the mounting surfaces are provided with means for engaging the rear and/or bottom side of a screen unit, wherein different mounting brackets having different means for engaging the rear or bottom side of different screen units on their respective mounting surfaces, may be fastened on the upper part of the integrated member characterised in that the upper surface of the loudspeaker unit is provided with a groove or ridge, in which groove or against said ridge the screen unit is placed, in order to obtain a fixed and common mounting plane between the loudspeaker unit and the screen unit.