First and most important of all, it is the membrane itself. Only in a Thiel (ACCUTON) ceramic membrane you will find such desirable features as extreme cone ridigity and hardness which is needed for speed and accurate impulse response. The stiffness/weight ratio of this material is unsurpassed, the only exception being diamond. Also you will find a very high internal sound velocity which is important for a high breakup frequency point and extended linear range.

The unique electro-chemical manufacturing process out of aluminum foil leads to very thin, form-stable diaphragms of Al²O³ in Sapphire lattice with high internal damping, unusual for such hard material. This feature is very important and responsible for very low coloration and distortion, unachieved by other membrane materials. It allows the use of first order filters even in 2-way loudspeaker designs.

The well balanced concave shape yields wide and uniform energy distribution, which is far more important than high on axis sound pressure. The small "ears" on tweeters and midrange drivers - though costly to make - achieve very efficient resonance damping. The frontplate is made of heavy, acoustically inert zinc instead of plastic or aluminum. All mechanical parts are manufactured to high standards and very close tolerances, usually better than conventional drive units.

These parameters are measured on random production samples by Bernard Thiel in our lab. Click here for exact » measuring conditions.

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