User Manual
6
Any tube amplier 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 amplier is reached after about 10 hours of quiet music playback. 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.
Your amplier is equipped with automatic bias module. It’s necessary to use vacuum tubes that have previously been pre-
selected and paired up in quads or pairs.
1) Disconnect the amplier from the mains socket, the power supply.
2) Remove the currently installed tubes from their respective sockets. Plug in the new replacement vacuum tubes in these
sockets.
Make sure that all of your wiring is connected in accordance with the information as provided above on page 5 of this manual.
Turn on the mains power of the Mira Ceti 300B mono power amplier – the vacuum tubes shall begin to glow. Make sure that the
sound source is turned on, playing, and then gradually increase the volume level in your preamplier.
BURING-IN PROCESS
VACUUM TUBES REPLACEMENT
VACUUM TUBES PROTECTIVE CAGE
PREMIUM VACUUM TUBES SET