JOYO Manufacturer-JOYO-9V500 Guitar Pedal Power Supply, 9V, 500mA

A 9V DC output and centre-negative polarity make this JOYO adapter a practical power source for compatible guitar effects pedals. Its 5.5 x 2.1 mm barrel connector matches pedals that require that plug size.

The adapter supplies 500mA at 4.5W, with a 1.5m cord for positioning your pedal and power connection within reach. Its input is rated for AC 100–240V, 50–60Hz.

A built-in filtering design is intended to help reduce AC noise and interference. That makes it a useful alternative to powering a compatible pedal with batteries, particularly when setting up a pedalboard or a dedicated practice space.

At a glance

This is a straightforward single-pedal power adapter rather than a multi-output power supply. It suits an effects pedal that specifically calls for 9V DC, up to 500mA, centre-negative polarity and a 5.5 x 2.1 mm barrel connection. Matching all four requirements helps ensure the adapter is appropriate for the pedal, connector fit alone is not enough to establish compatibility.

The 1.5m cord gives some flexibility when placing the pedal relative to the wall outlet. The adapter’s filtering components are designed to provide a cleaner DC output and help reduce interference while playing. Buyers generally describe the unit as functional and a good fit for their needs, while comments about noise are mixed, so the pedal’s own power requirements remain the key selection guide.

Tips for day-to-day use

Before connecting it, check the pedal’s power marking or manual for its required voltage, current, polarity and connector size. Use this adapter with a 9V DC, centre-negative pedal whose current requirement is within the 500mA output. A 5.5 x 2.1 mm plug and matching polarity are essential parts of that check.

For a home practice setup, route the cord so it reaches the outlet without pulling on the pedal’s power jack. This can keep the pedal in a convenient position on the floor while leaving its power connection accessible. The adapter’s 100–240V AC input rating supports use with a matching mains supply within that stated range.

Practical tips

If you are replacing a battery-powered setup, this adapter provides continuous mains power for a compatible pedal, so you can keep the pedal connected during a practice session without relying on a fresh battery. For a compact rig with one pedal, a single-output adapter is a simple, direct approach, a multi-output supply is a different setup for powering several pedals from one unit.

Keep the connection clean and seated, and avoid bending the cable sharply at the plug. If a pedal’s power specifications call for a different voltage, polarity, current arrangement or barrel size, choose an adapter that matches those requirements instead. The product information also describes short-circuit protection and noise-filtering components, features intended to support dependable everyday power delivery.

Is it worth it?

Worth considering if you need a dedicated 9V supply for a centre-negative effects pedal and want a 5.5 x 2.1 mm connector with a 1.5m cord. Its 500mA output and filtering design make it a practical choice for a compatible single-pedal setup, whether you are building a simple practice rig or replacing battery power. Match the pedal’s specified power requirements before connecting, and this JOYO adapter offers a clear, convenient way to keep that pedal powered from an AC outlet.