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1. Basic information
1.1 Mechanical construction
The case is fully made of aluminium. The audio-connectors are all gold plated to minimize electrical losses
and provide long lasting perfect contacts.
1.2 Power supply
A switch mode power supply delivers clean, hum-free electrical energy for the digital and analogue sections
of D/A-converter and the preamplifier. All voltages are additionally buffered by large capacitors directly in the
circuitry where they are needed.
The power amplifiers of C8 also are fed by a separate switch mode power supply. The C9 is equipped with
two independent switch mode power supplies - one for each power amplifier.
This concept guarantees that independently of the demanded output power the power amplifier has no
influence on the preamplifier or the D/A-converter.
1.3 Preamplifier section
The input circuits act extremely fast and use special semiconductors for exact and nearly noise free sound
reproduction. SMD technique allows a very compact circuit layout and thus extremely short signal paths.
The volume control is done by highly precise integrated circuits. They allow setting in 0,5 dB steps and their
channel balance is better than 0,05 dB. All this provides an absolutely precise, musical sound reproduction
from lowest to highest listening levels.
If You whish to correct the frequency response at low listening levels or to have more or less treble or bass,
You can activate the sound processor and set the frequency response. For linear reproduction the whole
circuitry is removed out of the signal path by relays and has absolutely no influence.
1.4 Power amplifier
C8 and C9 use for each channel a separate powerful and efficient digital class-D amplifier. These amplifiers
have an analog feedback loop from output to input. This ensures a nearly load-independent frequency
response and a very good damping factor.
Further highlights are very low output noise, low distortion and an extremely good efficiency. Even when
delivering peak power levels to the speakers they deliver over 90% of the supplied energy to the speakers
and thus produce nearly no heat.
