Børresen Acoustics Z1 and 01 Review

The cryogenic treatment of the metal parts is done by Børresen Acoustics in-house and in their own specific manner. The cryogenic treatment of the metal parts is a process that takes a total of 3 days. In the first 24 hours, the metal parts are cooled to cryogenic temperatures. During the next 24 hours, the temperature is kept constant at around -196° Celsius. During the following 24 hours, the temperature of the metal parts is gradually raised to room temperature. Gradual cooling and heating of the metal parts are critical to avoid thermal stress in the metal. The cryogenic treatment of the metal parts compresses and strengthens the structure of the metal and reduces the residual stress in the metal which normally occurs when metal changes from its liquid phase to a solid phase. The result of the cryogenic treatment of the metal parts is that the conductivity increases by about 6-8%, which in turn ensures faster and more transparent sound reproduction.