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Even though they are not primarily designed for this purpose, ABACUS active loudspeakers from all series are also very popular in the studio. Based on this experience, however, ABACUS has now developed something new that is designed precisely for this purpose, but also has its advantages for listening to music… Based on the Cortex electronics and a number of known and new drivers, the optimum configuration was developed in the laboratory. A frequency response with a deviation of no more than +-1dB from below 30Hz to just under 20kHz was achieved early on. Finally, the Cortex electronics were significantly upgraded and adapted for the new application.
- 3-way studio monitor speaker, fully active
- Left and right speaker side mirrored accordingly
- 4 ABACUS Dolifet power amplifier modules of the latest generation
- DSP-based, internal signal processing (for crossover and frequency response smoothing)
- DSP can also be programmed for room adjustment via external USBi interface
- Infinitely variable control options for
- Input gain (-6dB to +6dB)
- High shelf (-3dB to +3dB above 1kHz)
- Bass pad (-8dB to +2dB below 100Hz)
- Bass roll-off (16Hz to 80Hz)
- Electronics based on the ABACUS Cortex electronics with a few changes:
- larger heat sink
- additional regulator
- 120VA toroidal transformer
- enlarged motherboard in 4-layer construction
- Larger and thicker aluminum plate
- Elaborately improved automatic switch-on
- Low crossover frequency to the tweeter (approx. 1250Hz)
- High-quality chassis assembly
- 30mm dome tweeter with discreet sound guide
- 10cm bass-midrange driver with paper/glass fiber cone
- 20cm woofer with paper/glass fiber cone
- woofer driven by 2 amplifier channels in bridge circuit
- perfectly finished MDF cabinet
- textured paint finish in black-grey or traffic white
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.
- RMS power: 120 W
- Tweeter: 30mm dome tweeter
- Midrange speaker: 100mm
- Woofer: 200 mm
- Frequency response (+-1dB): 30 – 18.000Hz
- Frequency response (-6dB): 16 – 20.000