VTBP-201S Tube Bass Preamplifier User’s Guide
REAR PANEL CONTROLS
Ground Lift Switch: this switch lifts the chassis ground from one pin of the XLR connector. This is used
when hum and noise are present in the connection.
EQ/Flat Switch: switches between a flat tube buffered output and the main output of the preamplifier
outputs.
REAR PANEL OUTPUTS
Three Pin XLR: this output is fully balanced. It is the output used for recording and for connecting to PA
consoles. It is affected by the switches on either side of it.
Unbalance Output: this output is designed for connection to power amplifiers or other devices.
REAR PANEL EFFECTS LOOP
Effects Loop: this output connects to the input of your effects unit (compressor, delay etc.). The level
controls for output are on the front panel.
Effects Return: this input is connected to the output of your effects unit. The level controls for this input
are on the front panel.
Tuner Output: this output is designed for connection to your tuner. It is not affected by the mute switch
or volume control of the preamplifier.
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