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JOVNO Universal Power Supply 3V-24V 3A 72W Adjustable AC/DC Adapter 100~240V AC to DC 5V 9V 12V 15V 19V 20V with LED Display 14 Plugs 1 Reverse Polarity Converter Cable for LED
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Question] What should be the position of the polarity switch in my AC/DC adapter in order to match the polarity of my NUX DS-3 pedal? : r/guitarpedals
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