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Technical Info

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Loudspeakers in accordance with the Acoustic-Active Principle

The high-fidelity scene has not remained unaffected by technological advances; contemporary amplifiers, for instance, are built with an almost purist lack of superfluous filters and equalizers. And it is the simplest set-up in the best quality available that achieves a minimum of sound distortion. A new standard in fidelity has been set: less is more. As Bösendorfer acoustic researcher Hans Deutsch explains: "I have been working with this technology and applying this principle since the 1970s and it is in this spirit that I have developed my speaker systems. Bösendorfer loudspeakers made in accordance with the Acoustic-Active Principle mark the pinnacle of my career. The combination of state-of-the-art recording technology and the most modern techniques in amplifier construction used to produce these loudspeakers in conjunction with the appropriate cables, electronics and recordings, achieve the most breath-takingly true-to-life listening experience. This has been repeatedly confirmed, not only by journalists and specialist dealers, but first and foremost by the
musicians themselves and connoisseurs of authentic performance world-wide."

For detailed technical information request the Bösendorfer white paper "The Acoustic-Active Principle".

The heart of the matter

As a rule, conventional technology suppresses all resonances and overtones, linearizing the frequency curves by means of an overload of frequency filters, with little regard for the overall sound. No distinction is made between unwanted vibrations and essential sound resonances. Yet according to a basic principle of acoustics, resonances form the foundation for authentic sound. The sound produced by conventional loudspeakers fails to be lifelike because their resonances have all been overdamped. Bösendorfer, however, has managed to build cabinets with fewer unwanted resonances in the first place, eliminating the need for practically any damping. The "Acoustic Sound-Boards" on either side of the cabinet function as passive and therefore neutral resonators. These resonators or absorbers are activated only when connected directly to the tuners and set into vibration (a principle going back to H. von Helmholtz, inventor of the eponymous Helmholtz resonator). The "Acoustic SoundBoards" are large, distortion-free vibrating membranes by which Bösendorfer loudspeakers acquire the properties of a musical instrument. The reproduction of the authentic resonances of musical instruments and the human voice is one of the secrets of the life-like sound created by these outstanding loudspeakers.

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click on picture to down load setting up file in pdf format

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