Controls the input level of the tube circuit.
Sets the B+ voltage going to the tube with 35, 70 or 140 volts for more or less distortion.
Sets the output from the tube drive. Acts like a master volume on a tube guitar amp.
Variable low-pass filter from 500Hz to 20kHz.
Switch assigns the filters ‘pre or post’ the tube distortion circuit or bypasses the EQ section completely.
Variable high-pass filter from 5Hz to 500Hz.
Used to bypass the Space Heater circuit to compare between wet and dry signals.
Available when used with the Radial Workhorse, the Omniport accesses an instrument input.
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