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The Cortex 6 is the smallest model in the Cortex range. Thanks to the powerful 15 cm bass-midrange driver, the ABACUS Dolifet amplifiers, which are fed by a powerful power supply unit, and a precisely adjusted bass equalization, the small speakers go just as deep into the frequency response cellar as their larger siblings. When used in the near field, the closed 6-liter speaker reaches adult listening levels; for use in full-blown listening situations, the bass response can be limited and thus the maximum sound pressure increased. The Cortex 6 also performs well in combination with a subwoofer, but remains a compact alternative.
Thanks to its small dimensions and the standardized signal processing across the Cortex series, it is ideal for home cinema installations - as a subtle rear/surround speaker or even as a front system if high levels are not required or a subwoofer is also being used. The bass range can be adjusted using the rear adjusters for installation close to a wall or corner.
AMT Tweeter
The Air Motion Transformer (not to be confused with the visually similar \"ribbon\") is a special sound transducer whose basic principle was developed by Dr. Oskar Heil. Unlike conventional cone or dome tweeters, which in principle use a piston-like back and forth movement to displace or suck in air, here an accordion-like folded foil is moved in the magnetic field, which pushes air out of its gaps or sucks it in. This principle means that less mechanical material movement is required to generate the same sound pressure and acoustic distortions are reduced. Due to their geometric design, the sound of AMTs is somewhat more focused vertically as the frequency increases. This can have sonic advantages because reflections from the floor and ceiling are reduced.
DSP
With ABACUS active loudspeakers and subwoofers, the crossover, i.e. the division of the signals according to the frequency range, and the optimization of the loudspeaker characteristics are always carried out actively, i.e. before the power amplification (unlike with passive loudspeakers, where the already power-amplified signal is separated and influenced by coils and capacitors). Depending on the loudspeaker series and the associated complexity and price-performance ratio, ABACUS does this with analog filter circuits (e.g. C-Box, Trifon, Oscara) or, as here, with a digital signal processor. The built-in digital signal processor (DSP) performs a wide range of different tasks without increasing the complexity of the components immeasurably. The DSP used in ABACUS provides countless filters, takes over the function of the active crossover, linearization of the frequency response, phase and delay corrections and, on top of that, switching and control functions. Once the signal has been digitized, it can be processed as required without any loss of sound quality, because every filter and every control function is then just a computing task that is processed at a high clock frequency. The time delay caused by the processor is only approx. 0.3 ms.
- 2-way shelf speaker- 2 Dolifet power amplifiers
- RMS power (total): Approx. 80 W, distributed over all channels
- Frequency response: 16…80->20.000 Hz
- Bass Roll-off: Continuously adjustable from 16 Hz (-6dB) and from 24 Hz to 80 Hz (-3dB), below -12 dB/oct. in each case.
- Bass-Pad: Range below 250 Hz continuously adjustable from -8 dB to +2 dB
- Tweeter: AMT
- Mid-bass driver: 152 mm/4 Ω
- Net enclosure volume: 5,9 l
