User Manual

vacuum tubes shall begin to glow. Make sure that the sound source is turned on, playing,
and then gradually increase the volume level by turning the potentiometer.
The operation of the amplifier narrows down to adjusting the volume via VOLUME
potentiometer and selecting an audio signal source via rotation of the SOURCE switch.
”BURNING-IN” THE AMPLIFIER
Any tube amplifier requires an initial pre-heating (or "burn-in") period, in order so that it
achieves its full sonic potential. This is due to the presence of residua polarization of
dielectric elements and due to a necessary stabilization of working parameters of the
vacuum tubes. The stabilization of the electrical parameters of the system occurs in a natural
process whilst playing music through your audio system.
A preliminary degree of pre-heating of the amplifier is reached after about 10 hours of quiet
music playback.
The full sonic capabilities shall stabilize and unfold within a time-span ranging from
40 to 60 hours of music reproduction at a moderate volume levels.
In the initial period of operation of the amplifier it is advisable to avoid short-term
operation periods of the amplifier. Once activated, it should remain operational for a
period of about 4-6 hours.
REPLACEMENT OF THE VACUUM TUBES
Your amplifier is equpped with automatic bias module. It’s necessary to use vacuum tubes
that have previously been pre-selected and paired.
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