BØRRESEN Z-series technologies:

The principle that guided the development of the Z-series loudspeakers was to provide an uncompromising high-end audio performance with more conventional components than the 0-series.                                                                                          

Unwilling to make any compromise in high-end audio performance or manufacturing quality - distinctive characteristics for which BØRRESEN Acoustics has developed itself a reputation - the technology behind the Z-series consists of electronic components that are either adopted from the 0-series, completely redesigned, or are innovative spin offs resulting from BØRRESEN Acoustics’ extensive audio research activities.   


The closed ribbon tweeter is an entirely new technical development. 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 BØRRESEN planar 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.


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 - similar to 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.

Bass/midrange, magnet system:

The magnet system in the Z-series is a brand new construction. 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 new Z-series was now 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.


Cryo Edition (optional):

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


The Z-series is fitted with a parallel crossover configuration using the same exclusive components from the 0-series. This ensures a very mechanically stable crossover, which minimizes its own resonance.

Feet / prepared for Ansuz Darkz resonance control:

The adjustable feet of the ground cross plate are designed to be placed on Darkz resonance control separated by 3 titanium balls. Ansuz Darkz have been designed to ensure a distinctly better mechanical grounding to the floor.

Design & Layout:

The design and layout of the Z2 and Z3 models are spin offs from the development of the 0-series. These speakers are equipped with the large 8” inch bass drivers placed closer to the floor. Since the speakers are now acoustically much better integrated into the room, the bass drivers can deliver the music with a remarkably deep and tight bass.