KEF's low profile driver technology has been developed to meet the demand for ultra-shallow loudspeakers that can physically match the new generation of LED and OLED televisions and displays. The key to achieving this is the ability to reduce the bass driver depth from a typical 70mm down to less than 30mm, without sacrificing acoustic performance.

Extensive use of finite element analysis has allowed the development of a new type of twin-layered diaphragm that, despite being as little as 5mm in depth, behaves pistonically over the whole of its working bandwidth. Driver depth is further reduced by a concentrically attached suspension and a compact Neodymium magnet assembly. The result is a new class of drive unit, of high acoustic performance and extremely compact dimensions, that allows exciting new possibilities for loudspeaker system design.