In summary, today’s advanced in-ear wearable devices require small size, light weight, and long battery life in addition to providing a quality audio experience. Knowles Balanced Armature drivers provide a unique combination of excellent audio quality, low total volumetric requirements, and significant power savings both with normal drive and particularly with Class-D amplifiers. As the power consumption of chipsets is reduced under various use cases, the power savings obtained by using Balanced Armature drivers will become even more significant.