There are two types of voice coil actuators, “moving coil” and “moving magnet”. The materials of construction are similar, since they both use rare earth magnets, steel, copper wire and basic insulation materials. There is a tendency to want to say one type is better suited for certain applications, however there are many different sizes and shapes of voice coil actuators which make it difficult to make blanket statements about which type of actuator works better ...This story is related to the following:Voice Coil Actuators