Pedalboard Power Supplies: Isolated vs Daisy Chain (And Why It Matters)

Nobody Wants to Talk About Power

Power supplies aren't exciting. Nobody posts their Cioks on Instagram. Nobody demos a Voodoo Lab on YouTube and gets a million views. But I'll tell you what: the power supply is the foundation your entire rig sits on. Get it wrong and nothing else matters. Get it right and everything else works better than you expected.

We've rebuilt boards where the only change was the power supply. Same pedals, same cables, same signal chain. Just clean, isolated power. The player's reaction is always the same: "Why does everything sound better?"

What "Isolated" Actually Means

An isolated power supply gives each output its own independent power path. Electrically, each pedal is on its own island. They share nothing. No common ground, no common transformer. If one pedal does something weird electrically, the others don't care.

A non-isolated supply (daisy chain, or a multi-output supply that shares a transformer internally) connects all the pedals to the same ground path. This is fine if all your pedals play nice together. But the moment you add a digital pedal next to analog pedals, or a pedal that draws heavy current, or a pedal with a different voltage requirement, you introduce ground loops and noise.

The difference isn't subtle. On a board with 6+ pedals mixing analog and digital, switching to isolated power drops the noise floor dramatically. We're talking "is my rig even on?" quiet.

How to Pick the Right Supply

First, count your pedals and check their current draw. Every pedal has a milliamp (mA) rating, usually printed on the bottom or in the manual. Add them up. That's your minimum total draw. You want a power supply that can handle at least 20% more than that total, so you have headroom.

Second, check voltages. Most pedals run on 9V, but some run on 12V or 18V. Some power supplies have variable voltage outputs. If you've got a mix, you need a supply that accommodates all of them.

Third, think about the future. If you're running 6 pedals now but you know you'll add two more this year, get a supply with 8 outputs today. It's cheaper than buying a new supply later.

Our Go-To Recommendations

Budget (under $100): Truetone 1 Spot Pro CS6. Decent isolation, compact footprint, and enough outputs for a smaller board. It's not perfect but it's a massive step up from a daisy chain.

Mid-range ($150-250): Cioks DC7 or Strymon Ojai. Fully isolated, very low noise, and expandable. The Cioks is the one we use most in our builds. It's compact, reliable, and the outputs are properly isolated.

High-end ($300+): Strymon Zuma or Cioks DC10. If you're running 10+ pedals and you need serious headroom, these are what the pros use. Multiple voltage options, massive current capacity, dead silent.

The Daisy Chain Myth

People say daisy chains are fine if you're only running a few pedals. And honestly, sometimes that's true. Three analog pedals on a daisy chain might be perfectly quiet. But the problem is that it stops being true the moment you add a fourth pedal, or swap one for a digital unit, or play at a venue with dirty power. And then you're troubleshooting noise at soundcheck instead of warming up.

Isolated power removes the variable. You stop thinking about power. It just works. And that's what you want from the boring part of your rig. You want it to be so boring that you never think about it.

Installation Matters Too

Even the best power supply can introduce noise if it's installed wrong. Mount it under the board with the cables running separately from your audio patch cables. Don't bundle power and audio cables together. Use the shortest power cables that reach. And make sure the supply itself is physically separated from any pedals with sensitive analog circuitry.

This is the kind of detail that separates a quiet board from a noisy one. It's not hard, but it requires thinking about it during the build, not after.