Splitted Power-Supply:
Each amplifier has its own operating voltage rectifier and reservoir capacitors. Any modulation of the supply voltage by other channels is effectively decoupled. There are no compensating currents between the amplifiers for each frequency range.

Linear-Phase Crossover Networks: The theoretical background for this „Linear-Phase Crossover Networks“ was developed by Lipshitz and Vanderkooy at the “University of Waterloo” (Ontario) and is one of the brightest concepts the analogue technique has originated. Each channel's signal is generated by a time-compensated calculation of the difference between a filtered and an unfiltered signal. This simple subtraction results in a very homogeneous sound signal when the signals radiated by each channel add up in the air.

Power-MOS Amplifier: Basically, the power amplifier is an operational amplifier in bipolar technique combined with a DMOS power stage. This concept is superior to fully bipolar circuits in that it eliminates the „secondary breakdown“ effect and the need for SOA-monitoring. The quiescent current is actively controlled and compensated for temperature. The dynamic behaviour of MOS amplifiers is similar to tube amplifiers; but in our case the amplifier is equipped with a very effective local linearization feedback.

Selection of components: Frequency related components for filters and control loops will be tested and measured under realistic voltages and temperature conditions.

Mechanical absorption: is not required for controlling the membrane movement in a cybernetic system. It eliminates standing air waves in the housing and energy transfer into the housing walls. For this, we only use raw cotton. Due to its irregular structure and its capillary cavities raw cotton exhibits a higher and more broadband damping coefficient than synthetical fibres which are widely used.

Housing: As everybody knows, housing must have massive walls, low vibrating material, well placed strutting and a very careful sealing. Structural calculations are valuable in the construction of speaker housings. However, for sound quality dynamic effects like “vibration resistance” are more important. Frequencies of a standing wave should not coincide with bending waves. The wooden plates for the loudspeaker housing are carefully assembled and glued. Mechanical stress within the housing could lead to oscillation proneness.

Finishing: To us not every shiny appearance is good finishing. We process piano laquer, casted side after side, smoothened and polished by hand. This is a very extensive procedure as well because after each casting the piano lacquer has to cure for 14 days. The result is a glassy surface with a beautiful tone and very high durability which can be repaired even after years, if damaged.