Drivers for headphones have for many years been dominated by the moving coil design, where a coil is operating in a magnetic field transforming electrical current into a force. The coil is attached to a diaphragm, which transforms force into air pressure and sound is created.

This sounds like a simple construction, but especially the diaphragm can be a tremendous challenge to “tame” in its
behavior for being a close to ideal piston and this is to a high degree independent of the type of motor used for activating the diaphragm.

This White Paper deals with this issue and will evaluate two different diaphragm techniques commonly used with each their pros & cons, being the Mylar and the pistonic diaphragm types.

To read the full paper, you can download it here.