Fit and constraints
Intended use
Constraints
To use it
Questions
What voltage, polarity, and current does this exact revision require?
Ask before you buy via contact. Confirm power, condition grade, and included items against the listing photos.
Are the original box, power supply, and any model-specific accessories included?
Ask before you buy via contact. Confirm power, condition grade, and included items against the listing photos.
Does this listing match the exact revision and finish shown in the source photos?
Ask before you buy via contact. Confirm power, condition grade, and included items against the listing photos.
Description
The GUP Tech AB Box is a true-bypass pedal that routes audio between two inputs and two outputs, letting you switch between instruments or amplifiers. It operates passively without power, though an optional 9–12V center-negative supply (3mA) illuminates the LED. No internal buffering is used.