What do you call four 'connected' potentiometers?
A ganged potentiometer is two or more variable resistors of the same or sometimes different value, ganged together on one adjusting shaft, normally used on stereo systems as a volume control so that one can vary the volume of both channels at the same time.



They are commercially available with from two to four sections.

Ganged pots are also used for tone controls, pan controls, as well as in power supplies and other electronic lab equipment.