A system for mounting a picture projection screen between two upright floor-standing speaker units in which the picture screen can be drawn out from one of the speaker units and extended to and attached to the other speaker unit in one position and retracted back into the first speaker unit in another position includes a winding system arranged in the one speaker unit and an attaching system for attaching the free end of the screen in the other speaker unit. The winding system and the attaching system can be arranged to be repositioned so that at top edge of the screen is above the upper surfaces of the speaker units so as to provide access to electronic equipment arranged at a lower level between the two speaker units.