Borresen 03 Floorstanding Loudspeaker

Surplus energy and depth

The Børresen 03 speaker is equipped with enormous driver power and dynamics. The speaker resolves even the most fragile details from any audio source. The driving power in the lower bass segment, along with an easygoing punch, provide a unique sound stage liveliness.

Technologies and Components

Breaking new ground.
We began with the launch of the highly acclaimed and award-winning 0-series loudspeakers. Willing to break new ground, we designed innovative electronic components, used unconventional materials and employed state-of-the-art manufacturing processes. Since all of these audio components are engineered and assembled in-house, highest quality standards are permanently ensured.

The Børresen tweeter

Exceptional efficiency.
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.

Membrane – Bass/midrange

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.

Magnet system – Bass midrange

The iron-free revolution.
The Børresen magnet system* is breaking new ground. Its unique, innovative, and unprecedented technological design makes it stand out from anything else on the loudspeaker market.

Since the invention of the loudspeaker driver, the fundamental structure of magnet systems has not changed. Iron has been used to concentrate the magnetic flux in a narrow gap where the voice-coil is located. Iron is suited for the concentration of flux, but also poses some challenging issues when it comes to the voice-coil parameters. These parameters also change with the position of the voice-coil, creating considerable iron distortion.

The Børresen magnet motor is breaking new ground here. It is uniquely designed without the use of any iron. In the Børresen magnet motor, 4 opposing neodymium ring-magnets are used to squeeze the flux lines together over two solid copper discs, which now act like pole pieces.

The Børresen magnet system has a high flux of 1.1 Tesla. The solid copper pole rings act as very effective heat sinks. This endows the loudspeaker driver with a very high power handling capacity. The copper pole rings also reduce voice-coil inductance to an exceptionally low value of 0.04 MH (less than 10% of regular standard drivers).

The extremely low induction provides the driver with some very desirable attributes that enormously elevate the quality of acoustic performance. A much lower induction means a much faster driver, with no lag. This impacts the overall loudspeaker performance which now becomes much more refined and very detailed. Lower induction also causes less resonance impedance variation, which means less phase angles and less impedance variation for the driving amplifier. Lower induction will also curb the impedance rise over system resonances. In terms of musicality, this will extremely foster a sound base that is less boomy but much more pristine. Bass performance becomes very tight, well focused, and more authentic.

*The Børresen magnet system is patented

03 Cryo Edition

Extreme treatment, huge improvement.
Cryogenic treatment of all metal components of the loudspeaker results in a further significant improvement in 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 by 6-8%.

All metal components of these speaker 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.

03 Silver Supreme Edition

Silver and cryo optimization .
The Børresen Silver Supreme Edition loudspeakers are the absolute flagship versions among the Børresen loudspeakers. By replacing the copper pole rings by in-house manufactured, hand-crafted silver rings the inductance is reduced substantially. Additionally, all metal components, are subjected to a cryogenic treatment. These loudspeakers set a new and unsurpassed benchmark. Clarity, refinement and sound staging at its very best.