Ceramic drivers
In 1984 Bernhard Thiel, a production engineer with the firm Backes & Müller, invented an electrochemical process capable to deposit a very thin layer of extremely hard corundum (Al2O3) on a base of aluminum foil of any desired shape. This patented procedure allowed the manufacturing of very stiff, lightweight and highly damped loudspeaker membranes, features that were impossible to find at that time in other materials traditionally used for this purpose. Doped paper, for example, is well damped but not so stiff, metal alloys are, on the contrary, stiff but not damped, carbon fibres are stiff and damped but not so lightweight. On the contrary, the use of such ceramic material in the construction of dynamic speakers allows to achieve extremely low distortion levels, together with a much broader frequency response; in other words, the best and purest sound reproduction. It was for this reason, in fact, that Albedo, after having performed extensive tests on a large numbers of speakers from leading world manufacturers decided to chose the best technology available on the market today for its flagship product line, the HL series.

HL 2.2
Axcentia MKII

The reasons of a choice
The Albedo way in loudspeakers making
What is acoustical phase
The acoustical phase