Beryllium vs aluminium, what are the differences ?

Beryllium and aluminium are two metals used in the manufacture of loudspeakers. 

Beryllium is a light, rigid, blue-grey metal found in mineral rocks. Aluminium is a heavy, slightly rigid, silvery-white metal found in the earth's crust. 

Here are the advantages of using beryllium in an audio system :  

• Weight : 2.5 times lighter than aluminium. 
• Rigidity : 7 times more rigid than aluminium. 
• Speed of propagation of sound frequencies : Reduction of undesirable resonances. 
• Influence on transducer response : Faithful restriction of sound details. 
• Price : Higher due to its rarity.

The use of beryllium provides a perfect balance between lightness, rigidity and damping. This technology is present in FOCAL products such as the Sopra, Kanta, Utopia and many others. 

Suggestion related to this article :

- Do materials have an impact on acoustic quality ?