A 4-way switch box connecting three stereo pairs of input phono sockets to one stereo output pair for connection to a stereo amplifier. The three phono inputs are labelled 1 CDMD 2 TAPEDATDCC 3 VIDEO SOUND. In addition an AUX input number 4 is provided as a stereo 3.5mm jack socket. The selector switch is in the form of a 4-way rotary knob labelled 1 to 4 on a sloping front panel.