Motorised 20k dual gang rotary potentiometer alps rk27112mc030 this high quality 20k omega rotary potentiometer from the alps rk271 series can be adjusted manually or remotely controlled using the small built in dc motor its dual gang log law configuration makes it ideal for use as a volume control in hi fi amplifiers and cd dvd players and other professional audio applications alps rk27112mc030 20k motorised dual gang rotary potentiometer