Rocktron UTOPIA G300 - Manual (Page 27)

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The VARIAC ADJUST parameter adjusts the level at which the preamp stage in
the UTOPIA G300 begins to distort. A Variac is a voltage attenuating device that
plugs into an AC wall outlet and adjusts the voltage level to any device which
is plugged into it. For years, many guitarists have plugged their amplifier heads
into a Variac and reduced the voltage coming into the amplifier from the AC wall
outlet. This allows the amplifier tubes to reach saturation at a lower input level
and increases the gain produced. The VARIAC ADJUST parameter operates in a
similar manner as a conventional Variac -- where lowering the parameter value
lowers the level at which saturation will take place.
The BASS parameter adjusts the amount of low frequency information at the
output of each preset.
The MID parameter adjusts the amount of mid frequency information at the out-
put of each preset.
The TREBLE parameter adjusts the amount of high frequency information at the
output of each preset.
The PRESENCE parameter also adjusts the amount of high frequency informa-
tion at the output of each preset.
The BRIGHT parameter is displayed only when channel 1 (Clean) is active. The
options you have are IN or OUT.
The SCOOP parameter is displayed only when channel 4 & 5 (MEGA and
SCORCH) is active, and provides a fixed scoop of the mid frequencies.
The MASTER parameter determines the overall signal level coming out of the
preamp section.
The SYMMETRY parameter adjusts the symmetry of the wave form. This may
be adjusted from -28dB to +6dB. 0dB is symmetrical. This may be used to ap-
proximate a tube bias characteristic. Depending on the settings and polarity more
even or odd harmonics may be produced during the distortion process.
Tip: When using -28dB you will notice a sense of a clean tone mixed in with the
distortion. This is a direct result of the Asymmetrical waveform transformation
process. This function is not available when the CLEAN channel is selected.
By using varying amounts of symmetry a “ Tube feel” may be realized.
The POLARITY parameter determines which half of the wave gets processed.
This function is not available when the CLEAN channel is selected.
The DX-FILTER parameter filters off the "harsh" high-end content. The lower
the number the more high-end cut. Zero (0) is no change. This function is not
available when the CLEAN channel is selected.
VARIAC ADJUST
BASS
MID
TREBLE
PRESENCE
BRIGHT
SCOOP
MASTER
SYMMETRY
POLARITY
DX-FILTER
6. PREAMP Function continued.....