Some are more expensive. Some are larger. But no one is better...

ABACUS Linetreiber variabel

ABACUS does a lot of things differently ... and it seems, ABACUS is right.

ABACUS is not the typical high-end manufacturer; ABACUS products are solely based on physics. Dubious hi-fi scenes, fairytales and voodoo are not part of ABACUS. The basic maxim at ABACUS is: honest and solid products at fair prices; handmade in Germany.


ABACUS electronics originates from the german company AUDIO PRO Deutschland GmbH.

Since 1983 ABACUS develops  industrial electronics, i.e. measurement and control technology, energy and analog electronics, electro-mechanics und electro-acoustics.

Of special interest is the work in the field of hi-fi audio systems.

ABACUS possesses special circuitries, which have proven itself in the field of audio electronics. Using that knowledge substantial problems in audio engineering are solved everyday. This website is supposed to explain these technologies and their advantages.

From time to time, ABACUS technology can be way different from traditional technologies. However, the way, ABACUS does things, does not remain a secret at all. This website will try to explain as much as possible - at different points and considering the previous knowledge varying between readers.

Karl-Heinz Sonder

Karl-Heinz Sonder