Focal Micro Utopia

Beryllium - The ideal material for a dome.

An ideal dome must combine lightness, rigidity and damping. Currently, only one material offers the possibility of a significant improvement. Beryllium's densityis 2.5 times lower than Titanium and 1.5 times lower than Aluminium while its rigidityis 3 times higher than Titanium and 5 times superior to Aluminium. Which means that for a dome of identical mass, a Beryllium version is 7 times more rigid than one made of Titanium or Aluminum - which have similar rigidity for a given mass. Moreover, the velocity of sound in a Beryllium dome is 3 times fasterthan a Titanium version and 2.5 times faster than Aluminum. However, the manufacturing of Beryllium remains very difficult and its production has been limited to just three countries: the United States, France and Russia. To date, Great Britain, Germany and Japan do not manufacture pure Beryllium, rather using it in the form of an alloy. Beryllium is an excellent high-tech metal - the only metal able to scratch glass - it is only used in strategic applications in the aeronautical and military industries and consequently, its unique characteristics make it extraordinarily expensive, much more than gold and nearly 100 times that of Titanium.

Previous Next

Klik op de afbeelding voor een vergroting
Click picture for magnification

Height 425 mm
Width 250 mm
Depth 380 mm
Weight 17.5 kg
Finish Classic
Efficiency 89 db
Impedance 8 ohm
Bandwidth 50 hz a 40 khz
Bass 165 mm "w" power flower
Tweeter TBU 25mm beryllium pur focus ring