The Børresen T-series is crafted in Denmark, embodying the expertise gained from our O- and M-series. The T-series is the result of extensive research and innovation, delivering exceptional performance in a refined design. The Børresen T-series has been heavily inspired by the Børresen M-series using downscaled M-technologies.

Titanium Baskets & Optimized Airflow

Børresen IronFree5 Titanium SSE driver

The 5” drivers used in the Silver Supreme Edition version of the T-series loudspeakers feature baskets made of Titanium, which has a remarkably high structural rigidity and damping properties. Our research led us to make use computer-optimized finite element designs (FEM) which allowed us to 3D-optimize the shape of our baskets, so that they don't obstruct the airflow caused by the membrane's rear strokes and remain acoustically invisible.

The patented Børresen iron-free magnetic system has been further refined. Børresen uses iron-free drivers in all its loudspeakers. Their inductance is about ten times lower than that of conventional drivers. This exceptionally low inductance is even further reduced to an unprecedented minimum level – about 12 times lower than the inductance level of conventional, iron-based drivers. Here is how we achieved this: Since silver has 6-8% better conductivity than copper, we replaced the copper pole rings with in-house manufactured, handcrafted silver rings.

Børresen has replaced the conventional iron-core design with four neodymium (N52) rings in a patented mirrored alignment, improving voice coil responsiveness. This speaker features copper pole rings that resist flux changes, enhancing clarity. Since the two magnet pairs in the T-series motor system repel each other with great force that prevents their contact, two non-magnetic copper rings (one external and one internal) are placed between them. The benefits of these in-house cast parts are firstly that they maintain the motor’s cylindrical shape and uniform gap width without any additional profiling components. Secondly, copper is highly efficient in heat dissipation and lastly, it resists the change in the magnetic flux.

The membrane consists of three layers, laminated into a single unit: an aramid honeycomb core between two spread tow carbon fiber skins. The combination of these materials results in a moving surface with exceptional properties. Carbon fiber layers provide optimum stiffness in many different directions. The aramid honeycomb core has an excellent stiffness-to-weight ratio in the vertical direction, while graphene and boron whiskers mixed into the epoxy resin that binds the layers together increase the stiffness of crosslinks between carbon fibers. This in turn makes these bonds stronger, so the entire membrane becomes stronger and less noisy, but remains very light.

Cryogenic treatment of copper and silver rings in the T-series loudspeakers, along with internal wiring, baskets, crossover coils and tweeter improve conductivity, strength, and overall performance.

When metal components undergo cryogenic treatment, they are subjected to extreme cooling. In the wake of this process, the crystal structure of such a part contract more and more and alloying elements are being pushed out of it, so that it becomes very similar to a monocrystal. These structural changes of a metal component result in its three highly beneficial new traits. It becomes stronger, its inherent residual stress upon going from the liquid to solid phase during casting is reduced, and its conductivity is increased.

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.

Børresen loudspeakers are fitted with a serial crossover configuration. The reason for this is that the drivers share the very same flow of electric current in the crossover region. As a result, the electric current is phase-locked over the crossover region. Unlike standard parallel filtering, where each driver receives its own frequency and phase content, the new serial filters work by diverting out-of-band currents around the current flows, thus creating a much more coherent system. This unrivaled and innovative technological approach takes your music into a new echelon of acoustic delight.

For the crossover filter, we went to great lengths to source the very best and most sophisticated state-of-the-art components. The coils are foil types wound with paper isolation and impregnated with resin under vacuum to make them mechanically extremely solid and stable.

For crossover capacitors, we use arrays of small military spec stack-foil types. They have the best mechanical stability and lowest induction of any type of capacitor on the market (and they sound wonderful, too).

For tweeter attenuation resistors, we use metal strip types since they have, by far, the lowest noise figures and additionally, a very low thermal variation.

With bi-amping you are able to individually feed the bass section and the bass/midrange section which includes the treble. This not only provides sufficient power to each section, but also results in a cleaner, more precise sound.

This loudspeaker is designed with two types of bi-amping in mind. The first is speaker crossover bi-amping. The frequency between the bass section and the midrange/treble section is optimized, so that it provides the best performance.

The second option is active crossover bi-amping, where you can adjust the crossover frequency yourself. This type of crossover is the optimal solution for fine-tuning your speakers according to your listening room's acoustical properties, allowing you to control the amount of bass and the balance between the bass and midrange/treble. To further enhance your listening experience, Børresen's sister company, Aavik Acoustics, has developed a high-end Analog Active filter that works seamlessly with these new speaker models, providing the ultimate in precision and clarity. The Aavik active crossover is found in a variety of Aavik amplifiers.

The active square Tesla coils are embedded in our circuitry boards – one coil on the top and the counter coil on the rear side. The principle is exactly the same as the active Tesla coil and thus a great ability to eliminate noise than the passive Tesla coils.

A 3rd generation of the Ansuz analog dither technology has been developed. Analog dither technology originated in radar, where it ensured a stronger signal and thus greater range. The active Tesla coils send pulsating signals at precisely defined frequencies. These signals are sent in anti-phase. This significantly amplifies the musical signal and eliminates the background noise floor.

Analysis and studies have led to new options – and a lot of listening has resulted in this 3rd generation design which is a further optimization of the most effective frequencies which opens the soundscape even more and with the tiniest details when it comes to reproduction of the recordings.