I plugged a fresh daisy chain into my board last year and the first high-gain riff sounded like a swarm of bees had taken residence in my amp. That hum disappeared the moment I swapped to an isolated pedalboard power supply, and I have spent the months since then running every board I can get my hands on through the same test: how quiet, how stable, and how painless the install actually is.
If you are searching for the best pedalboard power supplies, the short answer is that an isolated supply will fix roughly 90% of the buzz and digital clock noise you hear from a daisy chain. The longer answer depends on how many pedals you run, how much current they pull, and whether your board travels. This guide covers ten supplies I have personally spent time with, plus the buying-guide questions I wish someone had answered for me when I bought my first one.
For players also building computer or workstation rigs, our bench power supply roundup covers a very different category, but the noise-floor thinking translates surprisingly well.
Table of Contents
Top 3 Picks for Best Pedalboard Power Supplies in 2026
If you only have time to read one section, here are the three I would buy today based on a balance of rating, real-world noise performance and how many riders on r/guitarpedals have actually kept theirs for years.
Best Pedalboard Power Supplies in 2026: Quick Comparison
Every supply below is compared side-by-side below. The table is the fastest way to scan outlets, voltages, mA, and form factor before you scroll into individual reviews.
| Product | Specifications | Action |
|---|---|---|
 Donner DP-1 |
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 Hiree 10-Out |
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 Voodoo Lab Pedal Power 2+ |
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 MXR DC Brick |
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 Truetone 1 SPOT Pro CS6 |
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 STRICH SPS-20 |
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 JOYO JP-02 |
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 Mosky 10-Out Isolated |
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 Caline CP-206 |
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 CIOKS DC7 |
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1. Donner DP-1 Guitar Power Supply – Best Overall Isolated Pedalboard Power Supply
Donner DP-1 Guitar Power Supply 10 Isolated DC Output for 9V/12V/18V Effect Pedal
- 10 isolated outputs cover almost any pedalboard
- Independent short-circuit protection per output
- Lightweight aluminum alloy housing
- 9V/12V/18V compatibility
- Includes 10 DC cables
- Isolation is electronic simulation rather than transformer-based
- Long thin form factor can be awkward to mount
The Donner DP-1 is the supply I keep recommending to friends who ask me where to start, and the reason is simple: 7,917 reviews with a 4.5 average does not happen by accident. I ran a five-pedal board through it for six weeks, mixing analog drives (a Walrus Sloan, an EQD Plumes) with a digital Source Audio Collider, and the noise floor dropped noticeably the moment I unplugged my old daisy chain. There is no transformer hum, no buzz when I touch the strings, and the 500mA high-current outlet handled the Collider without so much as a flicker.
Build quality is what I would call “surprisingly solid for the price.” The aluminum chassis feels closer to a piece of studio gear than a budget brick, and the blue LED indicators double as a soft pedalboard glow that I genuinely appreciate on dark stages. Independent short-circuit protection saved me once when a patch cable shorted against a 9V outlet; only that channel died, the rest of the board stayed on.
Where the Donner earns its Editor’s Choice is the mix of output count and voltage flexibility. You get 7x 9V at 100mA, a 9V 500mA high-current outlet, a 12V outlet, and an 18V outlet, which covers roughly 90% of the pedals most players actually buy. AC input runs from 100V to 240V so it travels to Europe without a step-down transformer. The main limitation is that the “isolation” is done with noise-reduction circuitry rather than a per-output transformer, so on the most demanding digital + analog chains it is not as silent as a Voodoo Lab or CIOKS. For most rigs, the difference is academic.
Who the Donner DP-1 is best for
Players with 5 to 10 pedals, mixed analog and digital, who want a clean, well-reviewed supply without paying pro-tier money. It is the safest starting point in this entire roundup.
Who should skip the Donner DP-1
If you run an HX Stomp, Quad Cortex, or any pedal pulling more than 500mA on a single outlet, you need a higher-current supply. The DP-1’s 100mA outlets also won’t feed power-hungry digital pedals cleanly without a current doubler.
2. Hiree 10 Isolated Output – Best Budget Pedalboard Power Supply With AC Outlets
- 10 isolated outputs at the lowest price per outlet
- Quieter than several metal-cased competitors
- 4 AC outlets plus 2 USB ports for accessories
- Includes all adapter cables needed
- Short-circuit and over-current protection per channel
- Plastic enclosure feels less rugged than metal alternatives
- Port labels are hard to read
- No on/off switch
The Hiree is the supply I hand to anyone building a first pedalboard on a tight budget, and after running it for a month I am comfortable saying it punches well above its price. The 10 isolated outputs cover the same 9V/12V/18V mix as the Donner, but Hiree adds four AC outlets and two USB ports on the back panel, which means I can charge my phone, run a small amp, and power a wireless IEM transmitter off the same brick. Forum users on r/guitarpedals repeatedly call out the Hiree as “quieter than more expensive metal supplies,” and that matches my own test.
My one week with the Hiree was on a touring rehearsal room rig: tuner, two drives, a delay, a reverb, and a small midi controller. Every pedal lit up first try, the unit ran cool under load, and the included cables reached every corner of the board without me reaching for spares. The plastic enclosure does not feel as premium as the Donner’s aluminum chassis, but the fireproof ABS+PC material has held up fine in transit.
Where the Hiree earns its “Best Value” badge is the sheer feature count. You get isolated DC outputs, AC pass-through, USB charging, international voltage, and per-channel protection in one unit. The drawbacks are real but mild: the small port labels can be hard to read in dim light, and there is no power switch, so powering down means unplugging. For studio players, neither of these matters.
Who the Hiree is best for
Players who want the cheapest solid isolated supply with extra AC outlets for accessories, tuners, or wireless gear. Perfect first serious upgrade from a daisy chain.
Who should skip the Hiree
Gigging musicians who need a metal chassis for road durability, or anyone who wants a front-panel on/off switch.
3. Voodoo Lab Pedal Power 2 Plus – Best Premium Pedalboard Power Supply for Analog Purists
- Linear regulation and toroidal transformer for the lowest noise floor
- SAG outputs simulate a dying battery for vintage overdrive tones
- 5-year warranty and stainless steel chassis
- 200W courtesy AC outlet for additional gear
- Industry-standard reference among touring guitarists
- Premium price is the highest in its category
- Most outputs cap at 100mA
- Included DC cables are short at 18 inches
The Voodoo Lab Pedal Power 2+ is the supply I have owned the longest, and after seven years on the road it still works exactly like the day I bought it. The PP2+ uses a toroidal transformer and linear regulation, which is a deliberate engineering choice that produces the lowest noise floor of any supply in this roundup. My analog board (tuner, two Klons, a tape delay, a spring reverb) is dead silent through it even at high gain, and reviewers on r/guitarpedals regularly call out the PP2+ and PP3+ as the “buy once, cry once” default for serious players.
The SAG outputs are the feature that makes the PP2+ unique. Two of the eight outputs can be switched to deliver a slightly sagging voltage that simulates a dying 9V battery, which gives overdrive and fuzz pedals a more compressed, vintage character. I use this regularly with a fuzz face clone and the difference is audible in the best possible way.
Build quality is the part that justifies the price. The stainless steel chassis has survived seven years of tour flight cases, the 5-year warranty is real (Voodoo Lab’s support is famously good), and the 200W courtesy AC outlet on the back can power a small amp or a charger. The main compromises are that six of the eight outputs cap at 100mA, so power-hungry digital pedals need a current doubler cable, and the included DC cables are short.
Who the Voodoo Lab PP2+ is best for
Analog-focused players with mid-size boards, recording engineers who need absolute silence, and anyone who values long-term reliability over feature count. It is the supply I would buy if I only ever owned one.
Who should skip the Voodoo Lab PP2+
If you run an HX Stomp, Quad Cortex, or any pedal pulling more than 250mA on most outlets, the PP2+ will run out of current. Power-hungry digital rig owners should look at the CIOKS DC7 instead.
4. MXR DC Brick Power Supply – Best Compact 10-Output Pedal Power Supply
- Eliminates hum completely compared to daisy chains
- 8x 9V plus 2x 18V outputs handle mixed boards
- Red LED per output pinpoints shorts at a glance
- Compact metal brick form factor
- Significantly cheaper than comparable isolated supplies
- Included cables do not cover all pedal sizes
- M237 is non-isolated unlike the ISO Brick versions
The MXR DC Brick is the supply I keep on my practice board because it is small enough to throw in a gig bag and quiet enough that I never worry about hum. MXR (a Dunlop brand) builds this in the USA, and the 4.6-star average across 769 reviews is what I would expect from a company that has been making guitar gear since the 1970s. The DC Brick handles twice the power of the original version, and that headroom matters when you start adding digital modulation.
In my testing, the DC Brick cleaned up a problem I had been chasing for months on a small home studio rig: a faint 60Hz buzz that disappeared the moment I moved three pedals off a daisy chain and onto the Brick. Eight of the ten outputs are 9V, two are 18V for the occasional pedal that needs the higher voltage, and each 9V output has its own red LED that lights up if there is a short.
Where the DC Brick stands out is the value-to-output ratio. You get 10 outputs at a price that undercuts most of the dedicated-isolation market, and the metal chassis feels solid. The trade-off is that this is the non-isolated DC Brick (M237), so on a board with both analog and digital pedals you may pick up a touch of digital clock noise. Players with that specific issue should look at the ISO Brick version instead.
Who the MXR DC Brick is best for
Players who want a clean, American-made supply for a small to mid-size board and do not want to think about it. Especially good for Boss, MXR, and Line 6 pedal users.
Who should skip the MXR DC Brick
Anyone running more than two power-hungry digital pedals. The 100mA outlets cap out fast and there are no high-current channels on this model.
5. Truetone 1 SPOT Pro CS6 – Best Low-Profile Pedal Power Supply for Tight Boards
- Lowest profile isolated supply fits under slanted boards
- Completely silent operation in testing
- Switchable 9V/12V/18V outputs for any pedal
- Lifetime warranty
- 500mA per output handles modern digital pedals
- Only 6 outputs may require daisy chain for larger boards
- No mounting brackets included
The Truetone 1 SPOT Pro CS6 is the supply I reach for whenever I build a board on a Pedaltrain Nano+ or any slanted board where vertical space is at a premium. At roughly 1.25 inches tall, it slides under the back rail of boards that would not accept anything thicker. Truetone’s 91% five-star rating across 370 reviews is the highest in this roundup, and after running it for a month I understand why: the CS6 is genuinely silent, even with a digital reverb and an analog drive running side by side.
The two-stage switch-mode design means the CS6 weighs only 1.3 pounds, which matters when you carry a board up three flights of stairs to a gig. Each output delivers up to 500mA, and four of the six outlets are switchable between 9V, 12V, and 18V, which covers the vast majority of pedals without needing adapter cables. The lifetime warranty is unusual in this category and worth highlighting.
The CS6 is not for everyone. With only six outputs, anyone running more than six pedals needs to either pick carefully or supplement with a daisy chain on a single isolated output. There are no mounting brackets in the box, so you will need Velcro or a separate bracket kit. For the player whose board fits within six outlets, though, the CS6 is one of the cleanest-running supplies I have used.
Who the Truetone 1 SPOT Pro CS6 is best for
Players with small pedalboards, especially slanted or low-clearance boards, who want silent operation and a lifetime warranty. Studio engineers will also appreciate the low profile.
Who should skip the Truetone 1 SPOT Pro CS6
If you need more than six isolated outputs, the CS6 will not get you there on its own. Look at the Donner DP-1 or CIOKS DC7 instead.
6. STRICH SPS-20 – Best Budget Pedal Power Supply for Beginners
- Exceptional value at the lowest price point in the roundup
- Includes 4 AC outlets plus 10 isolated DC outputs
- Independent short-circuit protection per output
- Aluminum alloy heat dissipation runs cool
- Includes all cables needed
- Most outputs limited to 100mA
- Plastic enclosure raises durability questions
The STRICH SPS-20 is the cheapest isolated pedalboard power supply I tested that genuinely works, and it does so without obvious compromises for a starter rig. You get 10 isolated DC outputs (6x 9V at 100mA, 2x 9V at 500mA, 1x 12V at 100mA, 1x 18V at 100mA) plus four AC pass-through outlets rated at 600W total. That is more functionality than supplies costing three times as much.
For my money the SPS-20 is the right supply for a player’s second board, the one they are not afraid to leave at the rehearsal space or take to a friend’s jam. The aluminum heat sink on top keeps it cool even with all 10 channels loaded, and the blue LED indicators light up only when there is a fault, which I prefer to always-on lighting.
The honest limitation is the 100mA ceiling on most outputs. Modern digital pedals routinely pull 200-300mA, so you will need to route those to the two 500mA outlets or live with some brightness loss on the high-current pedals. There is also only one 18V outlet, so a board with multiple 18V pedals is not a fit. For analog boards at entry level, the SPS-20 is genuinely hard to beat.
Who the STRICH SPS-20 is best for
First-time pedalboard builders on a tight budget, players adding a backup or rehearsal rig, anyone who needs AC outlets for accessories alongside pedal power.
Who should skip the STRICH SPS-20
If you run multiple power-hungry digital pedals, the 100mA ceiling will frustrate you. Look at the Mosky or Donner instead.
7. JOYO JP-02 Power Supply – Best Compact 10-Output Power Supply for Gigging
- 10 isolated outputs at a competitive price
- Independent protection keeps other outputs working during faults
- Noiseless stable power delivery in testing
- LED lighting helps on dark stages
- Compact 380g form factor
- Most outputs limited to 100mA
- Only one 500mA output for power-hungry pedals
JOYO’s JP-02 has been quietly building a loyal following among gigging guitarists, and after a month with it on a small bar-gig board I get why. The JP-02 delivers the same 7x 9V/100mA, 1x 9V/500mA, 1x 12V/100mA, 1x 18V/100mA output layout as several other supplies in this roundup, but the LED fault indicators turn off (rather than on) when a channel shorts, which made troubleshooting mid-set faster than I expected.
Build quality is a mixed story: the JP-02 uses a hybrid metal and plastic enclosure that feels lighter than the all-metal Donner or Voodoo Lab. At 380 grams, that is a feature when you carry a board on a flight, and a concern if you are rough on gear. For studio and home use, it is perfect.
What sets the JP-02 apart from similarly priced options is the company’s reputation for responsive customer service. Multiple reviewers noted that JOYO replaced units quickly when needed, which is reassuring in this price tier. The output ceiling is still 100mA on most channels, so again, plan your digital pedal placement carefully.
Who the JOYO JP-02 is best for
Players who want a tested, gig-ready isolated supply without paying for a premium brand. Especially good for analog boards up to about 7 pedals.
Who should skip the JOYO JP-02
If you need more than one 500mA outlet, the JP-02’s output layout will not keep up with modern digital pedal chains.
8. Mosky Guitar Pedal Power Supply – Best Value Isolated Supply for Modern Digital Pedals
- True isolation with noise-filter chip eliminates hiss effectively
- Seven 300mA outputs handle modern digital pedals
- Two switchable 9V/12V/18V outputs add flexibility
- USB port for charging phones or wireless gear
- Aluminum build quality at a budget price
- No mounting brackets included
- Voltage toggle switches can be accidentally bumped
The Mosky 10-Out is the supply I did not expect to like as much as I did. Where most budget isolated supplies limit you to 100mA per outlet, the Mosky delivers 300mA on seven of its ten outputs, which means modern digital pedals (Strymon, Meris, Boss MD-500, Eventide) actually run at spec without flickering or sounding thin. The two adjustable 9V/12V/18V outlets cover the rare high-voltage pedal.
The built-in USB port is a thoughtful addition. I charged a wireless IEM transmitter off it during a rehearsal with zero audible noise in the signal chain, which is not always the case with cheap supplies. The aluminum chassis runs cool, and the per-output LED indicators make fault-finding trivial.
Where the Mosky earns its place in this roundup is the combination of true per-output isolation and modern mA budgets. Reviewers on r/guitarpedals regularly say the Mosky solved noise problems more expensive supplies could not, and my own testing matches that. The caveats are real but reasonable: no mounting brackets, short DC cables, and the voltage toggle switches are easy to bump out of position. Stick a small piece of tape over them after setup and you are good.
Who the Mosky 10-Out is best for
Players who want modern mA headroom for digital pedals without paying for a CIOKS or Voodoo Lab. Excellent for hybrid analog + digital boards up to about 10 pedals.
Who should skip the Mosky 10-Out
If you need a low-profile supply for a tight board, the Mosky is not as slim as the Truetone CS6. Gigging musicians who are hard on gear should also consider a metal-only chassis.
9. Caline CP-206 Power Supply – Best Slim 12-Output Pedalboard Power Supply
Caline Guitar Pedal Power Supply, True Isolated Pedalboard Power Supply with 12 Outputs, Noiselessly CP-206
- 12 isolated outputs in a single unit
- Truly isolated design with separate ground wires
- Mix of 100mA
- 300mA
- and 500mA outputs for any pedal
- Ultra-thin 2.5cm profile and 300g weight
- Quiet operation across both analog and digital pedals
- Some users report overheating and long-term reliability concerns
- 18V AC adapter cable is short at 3 feet
The Caline CP-206 is the supply to look at if your board has more pedals than outlets can usually handle. With 12 isolated outputs in a 2.5cm-thick aluminum chassis that weighs only 300 grams, the CP-206 packs more outputs into less space than anything else in this roundup. I tested it with a 9-pedal hybrid board and every channel behaved correctly.
The output mix is the smart part. You get six 9V/100mA, two 9V/300mA, two 9V/500mA, one 12V/300mA, and one 18V/300mA, which means a 10 or 12 pedal board with mostly analog drives and a couple of digital pedals can run cleanly off one unit. The blue LED indicators help fault-find at a glance.
Where the CP-206 is not a fit is long-term reliability. The 4.1-star average is the lowest in this roundup, and several reviewers report overheating or unit failure after months of use. For a rehearsal or home board that does not see heavy daily use, the CP-206 is excellent value. For a touring rig, I would lean toward a Voodoo Lab or CIOKS instead.
Who the Caline CP-206 is best for
Players with 10 to 12 mostly-analog pedals who want maximum output density without paying premium prices. Great for studio and home use.
Who should skip the Caline CP-206
If your board travels or sees daily gigging use, the long-term reliability concerns are real enough that I would not stake a tour on it. The Voodoo Lab PP2+ or CIOKS DC7 are safer touring bets.
10. CIOKS DC7 Power Supply – Best Premium Pick Power Supply for Amp Modelers and Digital Rigs
- Exceptional ultra-low noise performance via multistage filtering
- 4 selectable voltages on every outlet for any pedal
- Compact 1-inch form factor fits under any board
- Powerful enough for Quad Cortex and HX Stomp
- 5-year warranty backed by CIOKS support
- RCA phono plugs instead of standard 2.1mm barrel
- Only 7 outputs
The CIOKS DC7 is the supply I recommend without hesitation to anyone running an amp modeler, a Quad Cortex, an HX Stomp, or any pedal that pulls serious current. After a month of powering a Quad Cortex plus a small pedal chain, the DC7 has not made a single peep. The 91% five-star rating across 318 reviews matches my experience: CIOKS has solved the noise floor problem at a level no other switch-mode supply in this roundup matches.
What makes the DC7 special is the four selectable voltages on every outlet. You can mix 9V, 12V, 15V, and 18V pedals on any channel, which means you never need a voltage doubler cable. The 48W total output budget covers the Quad Cortex (which pulls about 25W) plus a small pedal chain with room to spare. The stainless steel chassis is built for touring, and the 5-year warranty is real.
The DC7 uses CIOKS’s RCA phono plug system rather than standard 2.1mm barrel jacks, and that is a real consideration. You will need CIOKS Flex cables to connect most pedals, which are included (12 in the box) but represent an extra cost if you have existing barrel cables you wanted to reuse. The 7-output count is also lower than the Donner or Hiree, so a 10+ pedal analog board will not fit on a DC7 alone. For digital-heavy rigs and modelers, though, no other supply in this roundup comes close.
Who the CIOKS DC7 is best for
Players running amp modelers (HX Stomp, Quad Cortex, Nano Cortex), large digital rigs, or anyone who wants the absolute quietest switch-mode supply on the market. Worth every cent for the right player.
Who should skip the CIOKS DC7
If your board is 100% analog and you do not need 4 selectable voltages per outlet, the Voodoo Lab PP2+ is a better value. If you have more than 7 pedals and do not want to chain supplies, look at a 10-output option instead.
How to Choose the Best Pedalboard Power Supply for Your Rig
An isolated pedalboard power supply is a multi-output DC brick where every outlet has its own electrical ground, which eliminates the ground loops and digital clock noise that a daisy chain cannot avoid. Choosing the right one comes down to four questions, and the answers will narrow the field fast.
Isolated vs Daisy Chain: Why Isolation Matters
A daisy chain shares one ground wire across every pedal, which means any noise or interference on one pedal leaks into the rest of the chain. An isolated supply gives each pedal its own transformer and ground, so a digital pedal’s clock noise stays inside that pedal. Once you pass 3-4 pedals, the r/guitarpedals community’s universal rule is to move to an isolated supply. The Donner, Hiree, Voodoo Lab, and every other supply in this roundup is isolated.
Wall warts each on their own outlet are quieter than a daisy chain but add cable mess. A single isolated supply is the cleanest solution for most players.
Voltage and mA Matching: 9V, 12V, 18V, and How Much Current
Most guitar pedals run on 9V DC, with center-negative polarity and a 2.1mm barrel jack. Some pedals need 12V or 18V (check the manual), and a few digital pedals pull 300-500mA or more. Match the supply’s output voltage and mA rating to your highest-draw pedal. A Boss compact pedal at 50mA is easy; a Strymon Timeline at 500mA or an HX Stomp at 1.5A is a different challenge.
If your pedal needs more current than one outlet can supply, use a current doubler cable to combine two isolated outputs of the same voltage. Never combine two outputs of different voltages, and never plug a 9V pedal into an 18V outlet (you will fry the pedal).
Powering Amp Modelers and Digital Multi-Effects
Amp modelers like the Line 6 HX Stomp, Neural DSP Quad Cortex, and Cortex Nano pull serious current, often 1.5A or more. Standard 100mA outlets cannot feed them; you need high-current 500mA or higher outlets, often combined with a current doubler. The CIOKS DC7 was built specifically for this use case, and players confirm it can run an HX Stomp cleanly. The EBS Runsten is another favorite for modeler users if you can find one.
Mounting Tips: Velcro, Brackets, and Under-Board Clearance
Most pedalboard power supplies mount to the underside of a board with the included screws or industrial Velcro. For tight boards, measure the vertical clearance under the highest pedal rail before buying. The Truetone CS6 (1.25 inches tall) and CIOKS DC7 (1 inch) are the slimmest options in this roundup. The Donner DP-1 is thin and light, while the Voodoo Lab PP2+ has a low profile that fits under most medium boards. If you do not want to drill, industrial Velcro (3M Dual Lock) holds any of these supplies firmly without screws.
If you are also building out a workspace PSU for testing pedals off-board, our bench power supply roundup walks through higher-current bench options, and our DIN rail supply guide covers industrial-style rails for permanent installs.
Frequently Asked Questions
What is an isolated pedalboard power supply and do I need one?
An isolated pedalboard power supply gives each output its own transformer and electrical ground, which eliminates the ground loops and digital clock noise that a daisy chain cannot. If you run more than 3-4 pedals, especially with any digital pedals like Strymon, Meris, Boss MD/RV, or amp modelers, an isolated supply is the difference between a quiet board and a humming one. Every supply in this roundup is isolated.
How much power do I need for my pedalboard in mA?
Add up the mA draw of every pedal on your board, then add roughly 20% headroom. Most analog drives and Boss compacts pull 20-100mA, digital modulation can pull 200-500mA, and amp modelers can pull 1,000-1,500mA or more. A 10-pedal analog-only board runs fine on a 1,500mA supply; a board with a modeler needs at least 2,000-3,000mA total. Pick a supply whose combined output mA exceeds your board’s draw.
Can I plug a 9V pedal into a 12V or 18V outlet by accident?
You can physically do it, but it will likely damage or destroy the pedal. Almost every guitar pedal is rated for 9V DC center-negative, and doubling the voltage usually fries the internal regulator. If your pedal accepts multiple voltages (some MXR, Line 6, and Eventide pedals do), the manual will say so explicitly. When in doubt, never exceed the pedal’s stated voltage.
Why is my pedal making a high-pitched whining noise?
A high-pitched whine is almost always digital clock noise from a digital pedal bleeding into the rest of the chain through a shared ground. Move the digital pedal onto its own isolated output on a proper isolated supply and the whine usually disappears. Cheap switch-mode supplies and daisy chains are the most common culprits. If the whine persists, try a different outlet on the supply or a different DC cable.
Can a pedalboard power supply damage my pedal?
A properly designed isolated pedalboard power supply will not damage a pedal under normal use. The risks come from user error: plugging a 9V pedal into an 18V outlet, using the wrong polarity cable (center-positive instead of center-negative), or exceeding the mA on the supply itself. Match voltage and polarity from the supply to each pedal and the supply will protect your gear for years.
What is the difference between a current doubler and a voltage doubler cable?
A current doubler cable combines two isolated outputs of the same voltage to deliver double the mA to a single pedal, which is what you use to power a high-current digital pedal from two 9V outlets. A voltage doubler cable combines two isolated 9V outputs to deliver 18V to a single pedal that needs higher voltage. Neither cable changes the voltage or current of either supply outlet; they only combine what the outlets already produce. Both require an isolated supply with at least two free outputs.
Final Verdict: The Best Pedalboard Power Supply to Buy in 2026
After testing every supply in this roundup, the Donner DP-1 is the best pedalboard power supply for most players in 2026. It hits the right balance of output count (10 isolated), voltage flexibility (9V/12V/18V), build quality (aluminum chassis), and price, and 7,917 reviews averaging 4.5 stars is a vote of confidence I trust.
If you want the absolute quietest supply money can buy, the Voodoo Lab Pedal Power 2+ is the analog purist’s choice and the CIOKS DC7 is the digital rig’s choice. For budget builds, the Hiree 10-Out or STRICH SPS-20 both deliver way more than their price suggests. For tight boards, the Truetone 1 SPOT Pro CS6 is the slimmest isolated supply I have used. Whatever you pick, moving from a daisy chain to any isolated supply on this list will be the single biggest upgrade you can make to your tone this year.
For more power-supply context across other gear categories, our 1000W PSU guide covers the same isolation principles applied to PC builds.