Electro-Harmonix US9DC-100 9 Volt Eliminator Adaptor

This 9-volt DC power supply is a must - have for various pedals. It works great with USA Big Muff Pi, Small Stone (except Nano Small Stone), Small Clone, Dr. Q., Mini Q - Tron, and Octave Multiplexer. It's also suitable for vintage MXR Blue Box and Rat series distortion pedals. The input voltage range is 120V/60Hz, with an output of 100mA at 9V. The sleeve/tip configuration has a positive tip and a negative sleeve. PLU: US9DC100.

Using this power adapter is easy. First, make sure your pedals are compatible with it, like the USA Big Muff Pi or the vintage MXR Blue Box. Plug the adapter into a 120V/60Hz power source. Then connect it to your pedal. Remember, the tip of the plug is positive and the sleeve is negative. As for maintenance, keep it in a dry place. Avoid exposing it to extreme temperatures. If you notice any issues like no power output, check the connections first. If problems persist, it might need professional repair.