Why exotic materials for high end drivers?
The woofers: carbon
Woofer cones from Danish Audio Technology are made from two thin carbon reinforced paper cones, which are glued together with an expanding foam, using a support tool, to keep the cone in the correct shape. The foam is well damped to avoid resonances in the cone. The result is an extremely rigid and stiff cone, presenting fast, uncolored and distortion free bass. The voice coil is made from a mixture of kapton and aluminum. This means, the driver acts as a pure kapton voice coil driver, as long as the voice coil is within its linear working area. It also presents a very low mechanical resistance, which allows the driver to play bass with authority, even at low levels. All drivers are naturally generously ventilated, under the spider, from voice coil gap and not least through the pole piece, allowing the whole moving system to travel fast and freely, without any compression.
The midrange: ceramic
In 1984 the Backes & Müller production-engineer Bernhard Thiel invented a process to produce very thin sheets of extremely hard corundum (Al2O3), also known as sapphire. This patented procedure allowed the manufacturing of very stiff, light weighted and highly damped loudspeaker calottes. This new and very hard material facilitates loudspeaker drivers with broader bandwidth, lower distortion and a purer sound than ever before possible. This technology can be found in all our midranges made by German brand Accuton.
The tweeter: diamond
A thin dome of diamond is ideal for a tweeter because the stiffness to weight ratio of this material is really unsurpassed. A concave dome is used because the moving assembly is more rigid and better damped than convex domes, and it also shows a better dispersion. For this reason, the sonic character of diamond tweeters is not what you could expect, an overly “brilliant” sound, but it is just the opposite. The diamonds simply disappear, only music remains. This is a new way of relaxed listening and once you get used to it, you will never go back to other more conventional technologies.