ABACUS amplifiers control loudspeakers in a unique way. Using the amplifier technology, the loudspeaker systems response can be almost fully linearized, given that loudspeaker and amplifier are working as one optimized complementary system. This is realized in the new ABACUS bi-amped self-powered loudspeaker systems, offering outstanding properties: the ABACUS A-Box.

In the A-Box, each way possesses a separate ABACUS transconductance amplifier. The crossover network is realized by the digital signal procesor (DSP) processor. If all properties of the loudspeaker and the enclosure are known, the frequency response can be linearized – due to the ABACUS amplifier technology, even below the resonance frequency.

The integrated DSP offers a variety of functions, while requiring a considerably lower number of electrical components than in analog systems.

The DSP in ABACUS A-Box systems is used for the crossover network, equalization of the whole frequency response and especially the boost below the resonance frequency. Furthermore it also prevents the loudspeaker from overload and input overload. The automatic startup, when an audio signal is present, is controlled by the DSP, too.

A high-resolution AD/DA Converter is integrated on the DSP-chip used in the A-Box. This has the advantage that the signal paths remain as short as possible.

At the end, everything is back to analog; the loudspeaker is still an analog component (and so are your ears…).