Knowles Corporation has been developing a new dual-diaphragm balanced armature. The two self-contained diaphragms are driven by a single coil. Knowles had to overcome several issues in the design of the new balanced armature.
A dual diaphragm allows the product to be smaller whilst maintaining high output levels whilst also providing a “warm and clear sound”, according to Knowles.
The balanced armatures will primarily used in premium products for now. However, this could change as the price of the technology decreases. At the time of writing, only one product has been released using the technology – A joint venture between Astell & Kern and Campfire Audio.