Currently all speakers obey Hofmann's Iron Law of Audio. This longstanding law states that speakers must be either large or draw a tremendous amount of electrical power to produce sub-bass. In other words, no speaker on the market today can be simultaneously small, efficient and produce sub-bass.
Electrostatic speakers move thin membranes between two charged plates to produce extremely detailed and directional sound. The two main drawbacks of existing electrostatic speakers are their large size and inability to reproduce bass notes. Brane's Sub-millimeter Electrostatic Membrane Array (SEMA) solves these two problems by creating membrane motion that is perpendicular to the emitted sound waves. This patented design reduces speaker size twentyfold and forms a partial baffle that enables bass notes. The required input voltage is also substantially lower due to the sub-millimeter spacing between the two charged plates.
Conventional speakers are less than 1% efficient in large part because the membranes used to produce sound are much heavier than the air they move. A better approach is to use an advanced material called graphene to produce sound. Because a graphene membrane is just one atomic layer thick, it weighs about the same as the air it moves to produce sound.