Børresen Z5 Cryo

~~580000 €~~ 39999 €

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The Børresen Z5 Cryo Edition speaker is the top end loudspeaker of the Z-series and guarantees unsurpassed clarity, detailed subtlety, and unadulterated purity in its musical performance. This speaker opens up a new dimension of authentic sound experience of high-end music with amazing dynamics, natural lightness, and emotional passion.

Cool down upgrade

The cryogenic treatment of the speakers’ metal components results in a further significant improvement of conductivity and reduction in inductance. The result is literally opening up a new dimension of musical performance. A sound that is crystal clear, truly natural and utmost refined.

Extreme treatment, huge improvement

Cryogenic treatment of all metal components of the loudspeaker results in a further significant improvement in conductivity – unleashing the finest and most subtle musical details. When metal components undergo cryogenic processing, they are subjected to extreme cooling. In the wake of this process, the crystal structure of the metal contracts more and more. Alloying elements are pushed out of the grain structure of the metal, which now becomes very similar to a monocrystal. These structural changes in the metal have a profound effect on its audio properties, resulting in an increase of conductivity by 6-8%.

All metal components in the M-series undergo cryogenic treatment. The cryogenic processing cycle requires a 3-day-time window. Within the first 24 hours, the metal undergoes a cooling process from room temperature to cryogenic temperatures. During the second 24 hours, the metal parts are held at temperatures around -196°C (-321°F) before the temperature, within the next 24 hours, returns gradually to room temperature. The gradual cooling and heating is critical to avoid any thermal stress. The process strengthens and compresses the grain structure of the metal components and reduces inherent residual stress that occurs when metal solidifies from its liquid phase to a solid phase.

Børresen RP94 Ribbon Planar Tweeter

Elaborate finite element methods have been applied to linearize and optimize the magnetic flux field, to facilitate driver movement and to ensure high efficiency and outstanding linearity.

The efficiency of this closed ribbon tweeter amounts to an exceptional 94dB and operates from approximately 2.5 kHz upwards. The moving mass is extremely low at 0.01 grams. The totally concealed tweeter has the capacity to operate at an incredible speed, which is an absolute prerequisite to unlocking the most subtle and refined sound details of any kind of music. The enormous robustness of this tweeter allows it to handle extremely high transient peaks without any ear fatiguing breakups. No transformers are being used.

Impressing stiffness to weight ratio.

The Børresen membrane consists of a composite of two layers of very thin carbon on both sides of a 4 mm Nomex honeycomb core. This composite structure – like the one used in formula 1 type of racing cars – provides the ultimate combination of stiffness to weight ratio. The exceptionally low weight of only 5.5 grams allows a very high acceleration factor in the driver, resulting in both outstanding resolution and higher efficiency.

Conventional principle, unconventional performance.

With the invention of the patented iron-free driver system in the 0-series, Børresen Acoustics came to realize that it is possible to reduce induction to an amazing 0.04 mH, which is approximately 10 times lower than that of common driver systems. The challenge for manufacturing the Z-series was to design a new, but less costly driver system with significantly reduced induction. As a result, Børresen Acoustics developed a driver with an 8 mm voice coil and an induction of only 0.06 mH. By linearizing the magnetic field, the driver is less affected by the actual movement and is more easily controlled by the amplifier.

SPECIFICATIONS

Frequency response
25Hz – 50KHz

Sensitivity
90 dB / 1W

Impedance
4 ohms

Recommended Amplifier
50W

Tweeter
1 × Børresen planar ribbon tweeter

Driver (4.5”)
2 × Børresen bass/midrange driver: 4.5 inches

Driver (8”)
4 × Børresen bass/midrange driver: 8 inches

Dimensions (H × W × D)
151,0 × 23,0 × 70,0 cm

Weight
75,0 kg