Donner DP-1 Isolated Guitar Pedal Power Supply, 10 Outputs, 9V/12V/18V

For guitarists powering a pedalboard with effects that need different voltages, the Donner DP-1 brings ten isolated DC outputs together in one supply.

Its output mix covers 9V, 12V and 18V pedals, with dedicated current ratings for each connection. That makes it easier to plan a board around the power requirements of individual effects.

The aluminium housing weighs 196 g, and a blue LED indicator helps illuminate the unit and show output status. Independent short-circuit protection adds a useful safeguard when several pedals are connected.

Usage tips

Before connecting a pedal, match its required voltage and current with the rating of the DP-1 output you plan to use. The supply has seven 9V 100mA outputs, one 9V 500mA output, one 12V 100mA output and one 18V 100mA output. This range is useful when a board combines standard 9V effects with pedals that call for 12V or 18V.

For example, a guitarist setting up a board with several 9V effects and a separate 12V or 18V pedal can assign each to an appropriate output, rather than relying on one shared daisy-chain connection. The included power cables and polarity-reversal cables support pedalboard setup, check the pedal’s connector polarity before using a reversal cable.

Benefits

Each of the ten outputs has independent short-circuit protection. If one channel is short-circuited, the other outputs can continue working, helping keep the rest of the board powered while making it easier to identify the affected connection. The LED for the short-circuited channel turns off while the other functioning channel lights remain on.

The DP-1’s isolated connections offer a different approach from powering multiple effects through a shared daisy chain: pedals can be connected to separate outputs, with the available voltage and current ratings guiding placement. Its noise-reduction circuit is designed for low-noise operation, and the blue LED switch lets you turn the indicator lights off when you prefer not to have them illuminated.

Buyers often appreciate the compact design and the range of output options. Feedback on noise is mixed, so the practical benefit to focus on is the combination of isolated outputs, short-circuit protection and several voltage choices in one unit.

Product specs

• Type: Guitar pedal power supply
• Outputs: 10 isolated DC outputs
• Output ratings: 7 × 9V 100mA, 1 × 9V 500mA, 1 × 12V 100mA, 1 × 18V 100mA
• Input: AC 100–240V, DC 18V supply
• Connector type: Barrel connector
• Enclosure: Aluminium
• Weight: 196 g
• Indicators: Blue LEDs with switch
• Included: DC 18V power adapter, 10 DC power cables, 2 polarity-reversal cables and manual

Practical questions

Can the DP-1 power both 9V and higher-voltage pedals? Yes. It has seven 9V 100mA outputs, one 9V 500mA output, plus one 12V 100mA and one 18V 100mA output. Match each pedal’s voltage and current requirement to its assigned connection.

What happens if one connected output short-circuits? That channel’s LED turns off, while the other functioning outputs can continue to work. The independent protection also helps identify which connection needs attention.

Can the blue LEDs be switched off? Yes. Use the LED switch to turn off the indicator lights when you do not want them illuminated.

Buying verdict

The Donner DP-1 is suited to guitarists who want one pedalboard supply for a mix of 9V, 12V and 18V effects. Its ten isolated outputs, clearly differentiated ratings and channel-level short-circuit protection make it a practical choice for organizing power across a multi-pedal setup.