Westinghouse is based on the Night Owl Edison preamp and uses an EF86 pentode tube to get beautiful, rich cleans. The Level knob controls the output level and will stay clean through the whole sweep, letting you keep your tone just the way you want it with added warmth and volume.
The Volt knob controls the voltage level to the tube plate, going from 30V full counter-clockwise to 180V full clockwise. At 30V the tone of the preamp is more subtle and transparent, whereas higher voltage has more color and warmth.
Westinghouse takes a standard 9V input, and can accept center negative or center positive inputs. It uses internal regulators to supply 6V to the tube heaters and 30-180V to the plates, giving it the richness you expect from a full high-voltage preamp.
CURRENT DRAW NOTE: Like many Sushi Box pedals, this one uses a tube, which means current draw is a bit higher than a standard pedal. During warm up it will pull around 500mA on a 9V input, and when it has finished warming up it will pull about 215mA on a 9V input.