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The Børresen 05 speaker 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.

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.

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 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.


Frequency response25Hz – 50KHz
Sensitivity90 dB / 1W
Impedance> 4 ohms
Recommended Amplifier> 50W
1 x TweeterBørresen planar ribbon tweeter
2 x DriverBørresen iron free bass/midrange driver: 4.5 inches
4 x DriverBØRRESEN iron free bass/midrange driver – 8 inches
Finish:Walnut veneer
Black high gloss


Weight 75 kg
Dimensions 58 × 30.5 × 155 cm

3 years

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