Børresen 05 Silver Supreme:
The Børresen 05 Silver Supreme is the absolute loudspeaker flagship version that delivers the ultimate of Børresen’s audio loudspeaker technology – an outstanding musical refinement of an authentic soundstage. Music that is unrivalled in its purity and precision, unprecedented in its pristine clarity and laser-sharp punch.
The Børresen 05 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.
Børresen 05 Silver Supreme Magnet system – Bass/midrange
The Silver Supreme Edition.
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 has now been even further reduced to an unprecedented new 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.
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%.
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.
The cabinets are heavily braced, block milled, compressed wood structures, beautifully veneered in walnut and fitted with solid walnut inserts.
The tweeter section is vented to balance out the build-up of air pressure. The bass sections consist of tuned ports calibrated for musically relevant frequencies.
Frequency response 25-50000 Hz (50 KHz)
Sensitivity 90 dB
Impedance > 5 Ohm
Recommended Amplifier > 50 W
1 x Tweeter BØRRESEN planar ribbon tweeter
2 x Driver BØRRESEN patented iron free bass/midrange driver – 4.5 inches
4 x Driver BØRRESEN patented iron free bass/midrange driver – 8 inches
Finish: Walnut veneer
155,0 x W: 30,5 x D: 58,0 cm
61.0 x W: 12.0 x D: 22.8 inches
75,0 kg / 165.35 lbs
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