Rocktron Utopia B100 - Manual (Page 21)

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The PREAMP function is accessible in all confi gurations. The preamp stage offers 4 channel choices
ranging from clean to high gain for maximum sustain and distortion.
The PARAMETER SELECT knob will allow you to access these PREAMP parameters:
PREAMP Function
The CHANNEL parameter chooses one of the four (4) PREAMP types: Clean,
Dist 1, Dist 2, Dist 3
The GAIN parameter determines the gain value in the distortion stage.
The VARIAC ADJUST parameter adjusts the level at which the preamp stage in
the UTOPIA B100 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 bassists have plugged their amplifi er heads
into a Variac and reduced the voltage coming into the amplifi er from the AC wall
outlet. This allows the amplifi er 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 VOICE parameter is displayed only when channel 1 (Clean) is active. The
options you have are Deep or Bright.
The SCOOP parameter is displayed only when Channel 4 (Dist 3) is active, and
provides a fi xed scoop of the mid frequencies.
The MASTER parameter determines the overall signal level coming out of the
preamp section.
CHANNEL
GAIN
VARlAC ADJUST
BASS
MID
TREBLE
PRESENCE
VOICE
SCOOP
MASTER