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: ‘CD/MD’; 2: ‘TAPE/DAT/DCC’; 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.