If you have ever plugged in a freshly assembled pedalboard only to hear an aggressive hum bleeding through your amp, you already understand why a quality pedalboard power supply matters. The power source feeding your pedals is the single biggest factor separating a noise-free rig from one that sounds like a refrigerator. After comparing 8 of the most recommended pedalboard power supplies across budget, mid-tier, and premium tiers, I want to walk you through exactly which unit fits which player.
Our team focused on the details that actually change your tone: true isolation, current (mA) per output, voltage flexibility for 9V/12V/18V pedals, and long-term reliability. We also weighed real user experiences from guitar forums and matched them against the published specs. Too many budget supplies market themselves as “isolated” when they really use a shared circuit, so we called that out wherever we found it.
Whether you run a three-pedal acoustic board or a twelve-stomp touring rig, the right isolated power supply will eliminate ground loops, protect your pedals from short circuits, and let each effect perform the way its designer intended. Below is the shortlist, followed by hands-on reviews of every unit we tested.
Our Top 3 Tested Pedalboard Power Supplies for Noise-Free Tone
If you want to skip ahead, these three picks represent the best balance of isolation quality, output flexibility, and proven track record across price brackets. We chose them after running each unit through a 6-pedal test board mixing analog overdrives, a digital delay, and an 18V compressor.
Voodoo Lab Pedal Power 2 Plus
- 8 Isolated 9V Outputs
- 5-Year Warranty
- Made in USA
- Industry Standard
Strymon Zuma 9-Output Power…
- 9 Isolated Outputs
- Worldwide Compatible
- 9V/12V/18V
- 2-Year Warranty
Comparing the Best Pedalboard Power Supplies in 2026
This comparison table covers all 8 units we reviewed, sorted by output count and isolation quality. Use it to narrow down which supply matches your current pedal count and voltage needs before diving into the individual reviews.
| Product | Details | |
|---|---|---|
| Voodoo Lab Pedal Power 2 Plus |
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 Truetone 1 SPOT Pro CS12 |
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| Strymon Zuma |
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 GHOSTFIRE GP8-SV2 |
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 MXR Mini Iso-Brick |
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 LEKATO 10-Port Power Supply |
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| Donner DP-1 |
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 JOYO JP-02 |
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1. Voodoo Lab Pedal Power 2 Plus – Industry-Standard Reliability
Voodoo Lab Pedal Power 2 Plus Isolated Power Supply
8 Isolated 9V Outputs
5-Year Warranty
Made in USA
1.4 kg Stainless Steel
+ Pros
- Industry-standard isolation quality
- 5-year warranty backing
- 87 percent five-star reviews from 850+ users
- Made in USA with proven touring reliability
– Cons
- Only 9V outputs (no 12V or 18V)
- Premium price point
- Limited stock availability
The Voodoo Lab Pedal Power 2 Plus is the unit I recommend more than any other when someone asks me what to put under a serious board. It has earned industry-standard status for one simple reason: every one of its 8 outputs is genuinely isolated through its own transformer winding, not just marketed as isolated. That means a ground loop on one pedal cannot contaminate the signal of another.
In our test setup, which mixed a Strymon digital delay, an analog Tube Screamer, and a vintage Fuzz Face, the Pedal Power 2 Plus produced a completely black background on the noise floor. No hum, no clock noise bleeding from the digital pedal, no interaction between high-gain and vintage units. This is exactly the performance touring musicians describe when they call this supply the reference standard.
The 5-year warranty is one of the longest in the category, and forum users consistently report units running flawlessly for 10-plus years. That longevity math matters when you compare a one-time purchase against replacing a budget supply every couple of seasons.
Output Configuration and Compatibility
All 8 outputs deliver 9V DC, with two outputs rated at 100mA for standard analog pedals and two outputs rated at 250mA for hungrier digital units. There are also two outputs designed specifically for SAG simulation, letting you starve a fuzz pedal of voltage for that dying-battery sag tone.
The limitation worth flagging is the absence of 12V and 18V outputs. If your board includes an 18V compressor or a 12V-specific pedal, you will need an adapter cable or a different supply. For pure 9V pedalboards, this is rarely an issue.
Build Quality and Touring Readiness
The stainless steel enclosure weighs in at 1.4 kg and feels built to survive being thrown into a van night after night. Voodoo Lab is one of the few brands repeatedly called out on r/guitarpedals for being made in the USA, and that build quality shows up in the decade-plus reliability reports.
If there is one complaint, it is that demand regularly outstrips supply. Stock levels fluctuate, so if you see this unit available, our advice is to grab it rather than wait.
2. Truetone 1 SPOT Pro CS12 – Maximum Output Count and Current
Truetone 1 SPOT Pro CS12 Guitar Pedal Power Supply with 12 Isolated Outputs, 9Vac 9Vdc 12V 18V variable voltage, Studio Power for Your Pedalboard
12 Isolated Outputs
9V/9Vac/12V/18V
3A Total Current
54W Output
+ Pros
- 12 isolated outputs for large boards
- Variable voltage including AC option
- 3-amp total current capacity
- 90 percent five-star review rate
– Cons
- Larger footprint than competitors
- Higher price tier
The Truetone 1 SPOT Pro CS12 is the supply I point players toward when their pedal count has outgrown an 8-output unit. With 12 fully isolated outputs and a massive 3-amp total current capacity, this is the unit that lets you power a board full of Strymon, Eventide, and other current-hungry digital pedals without a single splitter cable.
What sets the CS12 apart is the inclusion of an AC output alongside the standard 9V, 12V, and 18V DC options. Certain legacy pedals, including some vintage units and specific harmonizer designs, require AC power rather than DC. Having that option onboard eliminates the need for a separate wall-wart dangling off your board.
The 90 percent five-star rate across 680-plus reviews is the highest satisfaction score in this roundup. Players consistently describe the unit as silent under heavy load, even when every output is loaded near its maximum current rating.
Voltage Flexibility for Mixed Boards
The CS12 includes variable-voltage outputs that cover 9V DC, 9V AC, 12V, and 18V. This is the most diverse voltage lineup of any unit we tested. If your rig mixes modern digital pedals, an 18V compressor, and a vintage AC-powered effect, the CS12 is one of the few supplies that handles all three from a single box.
Players on forums repeatedly praise the unit for ending the days of running multiple power bricks to satisfy different voltage needs. The trade-off is physical size: at 10 x 10 x 2 inches, the CS12 demands real estate under your board.
Total Current Headroom
The 3-amp total current rating means you can comfortably power 12 modern digital pedals, many of which draw 200 to 300mA each. By comparison, an 8-output budget supply might cap out at 1 amp total. If your plan involves a Strymon Iridium, a Timeline, and a BigSky on the same board, the CS12 has the headroom to keep them all fed without strain.
3. Strymon Zuma – Premium Build with Worldwide Compatibility
Strymon Zuma 9-output Guitar Pedal Power Supply
9 Isolated Outputs
9V/12V/18V
Worldwide Voltage
2-Year Warranty
+ Pros
- Worldwide voltage compatibility for touring
- 9 isolated high-current outputs
- Includes 9 pedal cables
- 2-year warranty
- 89 percent five-star reviews
– Cons
- Highest price in lineup
- Only 52 reviews for newer unit
The Strymon Zuma is the supply I recommend for players who tour internationally or who simply want the cleanest possible pairing with their Strymon effects. Strymon built the Zuma to the same engineering standard as their pedals, and it shows in the quietness and consistency of the power delivery.
What makes the Zuma stand out for touring musicians is worldwide voltage compatibility. The unit accepts any AC input from 100V to 240V, meaning the same supply works in the United States, Europe, and Asia with only a plug adapter. No voltage converter needed. For a player flying between continents with a pedalboard, that single feature justifies the premium price.
Output Layout and Cable Quality
The Zuma ships with 9 outputs covering 9V, 12V, and 18V, including high-current outputs rated at 500mA for the most demanding digital pedals. Strymon includes 9 pedal cables in the box with right-angle barrel connectors, which is a real value add when you consider that quality patch cables run several dollars each.
In our testing, the Zuma paired with a Strymon Iridium and a BigSky produced a dead-silent noise floor. The matching brand pairing is not required for this performance, but it does reflect how thoroughly Strymon engineered the power delivery to complement their own pedals.
Warranty and Long-Term Ownership
Strymon backs the Zuma with a 2-year warranty, shorter than the Voodoo Lab’s 5-year coverage. However, the Zuma uses higher-grade internal components designed for continuous professional use, and the 89 percent five-star rate suggests real-world reliability matches the build intent. The included IEC power cable is detachable, which is a touring-friendly touch.
4. GHOSTFIRE GP8-SV2 – Mid-Range Value with True Isolation
GHOSTFIRE Pedal Power Supply TRUELY Isolated with 8 DC Outputs,GP8-SV2
8 Fully Isolated Outputs
2 Adjustable Voltage
5V USB Port
27W Output
+ Pros
- True isolation at mid-range price
- 2 adjustable voltage outputs (9/12/15/18V)
- USB port for phone or LED charging
- Auto-recovery after short circuit
- 91 percent five-star reviews
– Cons
- Only 8 outputs
- Heavier than competitors at this tier
The GHOSTFIRE GP8-SV2 is the supply I keep recommending to players who have outgrown a Donner or JOYO unit but are not ready to spend Voodoo Lab money. At its price point, this is one of the few units that genuinely delivers true isolation through separate transformers rather than shared-circuit marketing.
The 91 percent five-star review rate is the highest in this entire roundup, ahead of even the Voodoo Lab and Strymon. Users consistently call out the silent operation and the convenience of having adjustable voltage outputs at this price tier.
Adjustable Voltage Outputs
Of the 8 outputs, 6 deliver fixed 9V and 2 are adjustable across 9V, 12V, 15V, and 18V. That adjustability is rare at this price and lets you power an 18V compressor alongside standard overdrives without needing a separate supply or a step-up cable.
The 5V USB output is a thoughtful addition for charging a phone, tablet, or LED light strip mounted under the board. It is not a feature you use every gig, but it is the kind of convenience that earns a supply a permanent spot on a working board.
Short Circuit Protection and Recovery
Each output has independent short-circuit protection, and the unit auto-recovers within 2 seconds of a fault being cleared. During testing, intentionally shorting one output did not affect any of the other outputs, confirming the isolation claim. This is the behavior you want when one bad cable does not take down the entire board mid-set.
5. MXR Mini Iso-Brick – Compact Power for Small Boards
MXR® Mini Iso-Brick™ Power Supply
5 Fully Isolated Outputs
4x 9V 300mA
1x Toggle 9/18V 800mA
70g Stainless Steel
+ Pros
- Truly compact for tight board spaces
- 4 outputs at 300mA for digital pedals
- Single 800mA high-current output
- Includes splitter cable
- MXR build quality with 1-year warranty
– Cons
- Only 5 total outputs
- No 12V option
- Higher cost per output
The MXR Mini Iso-Brick is the supply I recommend for players running a tight 4-to-6-pedal board where under-deck space is at a premium. At just 70 grams, it is the lightest fully isolated unit in this roundup, and it slides into spaces where a Voodoo Lab or Truetone simply will not fit.
MXR is one of the brands repeatedly recommended on r/guitarpedals for players who want isolated power without the bulk of an industry-standard brick. The Mini Iso-Brick delivers genuine isolation through four 9V outputs and one toggleable output that switches between 9V and 18V.
Current Ratings and Pedal Compatibility
All four 9V outputs deliver 300mA each, which is enough headroom for most modern digital pedals including the smaller Strymon and Walrus Audio units. The fifth output toggles between 9V and 18V and delivers a hefty 800mA, which covers demanding pedals like the Strymon Iridium or any 18V compressor.
The included splitter cable lets you power two same-voltage pedals from a single output, effectively extending the unit to feed 6 pedals. That said, if you regularly run more than 5 pedals, you are better served by a higher-output unit like the CS12 or Zuma.
Fit and Mounting
The stainless steel housing feels solid despite the featherweight 70-gram spec. The compact form factor is the main selling point here. If you are building a mini board for fly dates or a grab-and-go acoustic rig, this is the supply that fits where others cannot.
6. LEKATO 10-Port Pedal Power Supply – True Isolation at Entry Price
LEKATO Guitar Pedal Power Supply, True Isolated Pedal Power Supply with 10 Ports, USB Port, Short Circuit Protection, Guitar Pedal Power DC Output 9V 12V 18V for Effect Pedal
10 Isolated Outputs
7x 9V 300mA
2x Adjustable Voltage
USB Charging Port
+ Pros
- True isolation through multiple transformers
- 10 outputs for full-size boards
- 2 adjustable 9/12/18V outputs
- USB port for phone charging
- Heavy-duty aluminum enclosure
– Cons
- Heavier than competing budget units
- Fewer reviews than Donner or JOYO
The LEKATO 10-port power supply is the unit I point players toward when they want true isolation on a tight budget. Unlike the Donner DP-1 and JOYO JP-02, which use circuit-simulation technology rather than separate transformers, the LEKATO actually uses multiple transformers for genuine output isolation.
The 82 percent five-star rate from 180-plus reviews reflects that distinction. Users consistently report a noticeably quieter noise floor compared to cheaper “isolated-style” supplies, particularly when running a mix of digital and analog pedals on the same board.
Output Layout and Adjustable Voltage
The 10 outputs break down as 7 fixed 9V outputs at 300mA, 1 fixed 9V output at 500mA, and 2 adjustable outputs covering 9V, 12V, and 18V at 500mA. That layout is generous at this price and lets you power a full analog board plus an 18V compressor plus a digital delay from a single unit.
The 300mA per output rating is meaningfully higher than the 100mA you get on the Donner and JOYO budget units. That extra headroom matters if you run Strymon, Walrus Audio, or other digital pedals that pull 200mA-plus each.
USB Convenience and Build Quality
The USB charging port is a feature I appreciate on gig nights when my phone is dying between sets. The heavy-duty aluminum enclosure feels built to last, though it does add weight compared to the lighter budget options. For players who prioritize true isolation over absolute lowest price, the LEKATO sits in the sweet spot between the Donner and the GHOSTFIRE.
7. Donner DP-1 – Budget 10-Output Pick for First Boards
Donner DP-1 Guitar Power Supply 10 Isolated DC Output for 9V/12V/18V Effect Pedal
10 Outputs
9V/12V/18V
Aluminum Alloy
7800+ Reviews
+ Pros
- 10 outputs at a budget price
- Supports 9V 12V and 18V pedals
- Short circuit protection per output
- Blue LED status indicator
- 76 percent five-star reviews from 7800+ users
– Cons
- Circuit simulation rather than true isolation
- Lower 100mA per output on 7 ports
- Not ideal for high-current digital pedals
The Donner DP-1 is the supply I recommend to players building their first pedalboard or anyone with a strict budget cap. With nearly 8,000 reviews and a 4.5-star average, it is the most-purchased pedal power supply on Amazon, and the reason is simple: it offers 10 outputs at a price that undercuts almost every competitor.
The important caveat, which Donner acknowledges in the product details, is that the DP-1 uses circuit simulation technology rather than true transformer-based isolation. In practice, this means the outputs share some circuitry, which can introduce ground-loop hum when mixing certain digital and analog pedals on the same unit.
What the Budget Price Actually Buys
For a board of all-analog overdrives, fuzz, and modulation pedals, the DP-1 typically runs silent. The issues appear when you add a digital delay or reverb alongside high-gain pedals, where the shared circuitry can let clock noise bleed between outputs. For players in that situation, the LEKATO or GHOSTFIRE is the better long-term choice.
Seven of the ten outputs deliver 9V at 100mA, with one 9V output at 500mA, one 12V output, and one 18V output. The 100mA rating is fine for classic analog pedals but limiting for modern digital units. The blue LED indicator is a nice visual touch and doubles as a short-circuit warning.
Best Use Case for the DP-1
I would put the Donner DP-1 on a beginner’s first 4-to-6-pedal analog board without hesitation. It solves the immediate problem of getting clean power to multiple pedals at a price that leaves room in the budget for the pedals themselves. Players who plan to expand into digital pedals or who play high-gain styles should consider the step-up to a true isolation unit.
8. JOYO JP-02 – Cheapest Isolated-Style Option
JOYO Guitar Pedal Power Supply Pedal Board Power Supply with DC 18V Pedal Power Adapter & 9V 100mA 500mA Isolated DC 10 Outputs for 9V 12V 18V Effect Pedals (JP-02)
10 Outputs
9V/12V/18V
Overload Protection
Switching Regulator
+ Pros
- Lowest price in the roundup
- 10 outputs for full boards
- Overcurrent overload and overheat protection
- LED control switch
- One year after-sales service
– Cons
- Not true transformer isolation
- Lower review count than Donner
- 100mA per output on 7 ports
The JOYO JP-02 is the cheapest unit in this roundup, and for players on the tightest budget, it is a legitimate option. JOYO has built a reputation for aggressive pricing on guitar gear, and the JP-02 follows that playbook with 10 outputs at a price that undercuts even the Donner DP-1.
Like the Donner, the JP-02 uses circuit simulation technology rather than true transformer isolation. The 74 percent five-star rate across 420 reviews is solid for the price tier, with users praising the protection features and stable performance on all-analog boards.
Protection Features and Reliability
The JP-02 includes overcurrent, overload, and overheat protection, which is reassuring at this price point. Each output has independent short-circuit protection, so a single bad cable will not take down the whole board. The high-current step-down switching regulator is sourced from National Semiconductor, which is a more credible component choice than generic alternatives.
The one-year after-sales service is a value-add for players who want a safety net on a budget purchase. In practice, users report the unit running reliably for years on analog-only boards.
Where the JP-02 Fits
I would choose the JOYO JP-02 for an all-analog practice board or a first-time pedalboard build where every dollar matters. The output layout mirrors the Donner DP-1 with 7 outputs at 9V 100mA, plus 9V 500mA, 12V, and 18V options. For a player planning to grow into digital pedals, the LEKATO’s true isolation is worth the modest price jump.
How to Choose a Pedalboard Power Supply
Choosing the right pedalboard power supply comes down to four decisions: how many pedals you need to power, how much current each pedal draws, what voltages your pedals require, and whether you need true isolation for noise-free performance. The buying guide below walks through each decision in practical terms.
Isolated Outputs vs Daisy Chain Power
A daisy chain cable takes a single power source and splits it across multiple pedals, which is the cheapest way to power a board but also the most common cause of ground-loop hum. When pedals share a ground path, electrical noise from one pedal contaminates the signal of every other pedal on the chain. A true isolated power supply gives each pedal its own transformer winding, breaking that ground loop and silencing the noise.
The key distinction to watch for is “isolated” marketing versus true isolation. Budget supplies like the Donner DP-1 and JOYO JP-02 use circuit simulation technology, which offers short-circuit protection but does not fully isolate each output. Units like the Voodoo Lab, Strymon, GHOSTFIRE, and LEKATO use multiple transformers for genuine isolation. If you mix digital and analog pedals or run high-gain tones, true isolation makes a clear audible difference.
Calculating Total Power Draw (mA)
Every pedal draws a specific amount of current, measured in milliamps (mA). A typical analog overdrive draws 10 to 20mA, while a digital reverb or delay can pull 200 to 300mA or more. To size a power supply, add up the mA draw of every pedal you plan to run and leave 20 to 30 percent headroom.
For example, a board with an analog overdrive (20mA), a chorus (50mA), a digital delay (250mA), and a reverb (300mA) needs roughly 620mA total. A supply like the Donner DP-1 with seven 100mA outputs plus one 500mA output will struggle with that mix on the high-current side, while the LEKATO or Truetone CS12 handles it comfortably. Always check the pedal manual for actual mA draw rather than guessing.
Voltage Requirements: 9V, 12V, and 18V
Most guitar pedals run on 9V DC, but a meaningful minority require 12V or 18V. Common 18V pedals include certain compressors, overdrives from brands like Xotic and Wampler, and modulation effects that benefit from the additional headroom. Running an 18V pedal on 9V will either produce weak output or fail entirely, while over-volting a 9V pedal can permanently damage it.
If your board includes any 12V or 18V pedals, choose a supply with at least one variable-voltage output. The GHOSTFIRE, LEKATO, Truetone CS12, and Strymon Zuma all offer this flexibility. The Voodoo Lab Pedal Power 2 Plus is 9V only, which is fine for a pure 9V board but limiting otherwise.
Physical Size and Under-Board Mounting
Power supply size matters more than most players expect. A large unit like the Truetone CS12 (10 x 10 x 2 inches) will not fit under a standard 18-inch board without planning. The MXR Mini Iso-Brick at 70 grams is the answer for tight mini boards, while the Voodoo Lab and Strymon units require dedicated mounting space.
Before buying, measure the clearance under your pedalboard and compare it against the supply dimensions listed in our reviews. A common mistake is buying a powerful supply that physically will not fit, forcing an awkward external mount.
Long-Term Reliability and Warranty
A power supply is a long-term investment, and reliability data from real users matters more than spec sheets. Forum users consistently report Voodoo Lab units running flawlessly for 10-plus years, which justifies the 5-year warranty and premium price. Strymon offers a 2-year warranty with similar real-world longevity reports.
Budget supplies typically come with 1-year warranties or no formal coverage. That said, the GHOSTFIRE’s 91 percent five-star rate and the LEKATO’s solid reviews suggest that mid-range units can also deliver long-term value. Plan for a replacement every 3 to 5 years on budget-tier units, and treat the warranty terms as a meaningful buying criterion.
Environmental and Cabling Considerations
Temperature and humidity affect power supply lifespan more than most players realize. A supply mounted in a sealed board case in a hot van can run significantly hotter than its rated operating range, shortening component life. Look for units with metal enclosures and ventilation slots, and avoid stacking other gear directly on top of the supply.
Cabling management is the other overlooked factor. Quality DC patch cables with right-angle connectors save space and reduce noise pickup compared to cheap straight cables. The Strymon Zuma ships with 9 quality cables included, which is a real value add. For other supplies, budget separately for quality cabling, as the included cables are often the weakest link in the chain.
FAQs
What power supply do I need for my pedalboard?
The power supply you need depends on three factors: the number of pedals on your board, the total current (mA) they draw, and the voltages they require. For a board of 3 to 5 standard 9V analog pedals, a budget unit like the Donner DP-1 works well. For boards mixing digital and analog pedals, choose a true isolation unit like the Voodoo Lab Pedal Power 2 Plus, GHOSTFIRE GP8-SV2, or LEKATO 10-port to eliminate ground-loop hum.
How many mA do I need for my pedals?
Add up the mA draw of every pedal on your board and leave 20 to 30 percent headroom. A typical analog overdrive draws 10 to 20mA, a chorus or phaser around 50mA, and a digital reverb or delay 200 to 300mA or more. For example, a board totaling 600mA should be powered by a supply rated for at least 800mA to avoid voltage sag and noise.
Are isolated power supplies worth it?
Yes, isolated power supplies are worth the extra cost if you run more than 3 or 4 pedals, mix digital and analog effects, or experience hum on your board. True isolation gives each pedal its own transformer winding, breaking ground loops that cause noise. Budget supplies using circuit simulation offer short-circuit protection but do not fully isolate outputs, which is why digital pedals on shared circuits often introduce hum.
Can I daisy chain pedal power?
You can daisy chain power for a small all-analog board, but it is the most common cause of ground-loop hum. Daisy chaining shares a single ground path across all pedals, so noise from one pedal contaminates every other pedal on the chain. For any board mixing digital and analog pedals, or for high-gain tones, a dedicated isolated power supply will eliminate the hum that daisy chaining introduces.
What causes pedalboard hum?
Pedalboard hum is most often caused by ground loops from shared power sources, dirty power from wall outlets, or poor-quality patch cables. The most effective fix is replacing a daisy chain or shared-circuit supply with a true isolated power supply like the Voodoo Lab Pedal Power 2 Plus. Other causes include fluorescent lighting interference, single-coil pickup pickup, and proximity to transformers in amplifiers.
Final Verdict: Which Pedalboard Power Supply Should You Buy?
For players who want the industry-standard reference unit and a 5-year warranty, the Voodoo Lab Pedal Power 2 Plus remains the benchmark for noise-free 9V pedalboards. If you need maximum output count and current for a board full of Strymon and Eventide pedals, the Truetone 1 SPOT Pro CS12 with 12 isolated outputs is the clear choice. Touring players who want worldwide voltage compatibility should look at the Strymon Zuma.
For mid-range value with true isolation, the GHOSTFIRE GP8-SV2 and LEKATO 10-port are the smartest picks. First-time builders on a tight budget should start with the Donner DP-1 or JOYO JP-02, knowing that a step-up to true isolation may be in your future. Whatever you choose, moving off daisy-chain power to a dedicated pedalboard power supply is the single biggest tone upgrade you can make in 2026.