I spent three months dealing with buzzing, humming pedals before realizing my cheap power adapter was the culprit.
The Donner DP-1 is the best guitar pedal power supply for most players based on our testing of 10 popular models.
After testing everything from $12 daisy chains to $280 professional units, we found massive differences in noise reduction, reliability, and pedal compatibility.
This guide covers budget options under $20, mid-range isolated supplies around $100, and premium systems over $250 to help you find the perfect match for your pedalboard.
Our Top 3 Guitar Pedal Power Supply Picks
Complete Guitar Pedal Power Supply Comparison Table
Here's how all 10 power supplies compare in features, price, and customer satisfaction:
| Product | Key Features | Action |
|---|---|---|
JOYO DC 9V
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Donner DP-1
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Donner DPA-1
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D'ADDARIO 9V
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Voodoo Lab X8
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MXR DC Brick
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JOYO JP-02
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1 SPOT Pro CS6
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Voodoo Lab 3 PLUS
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Strymon Zuma
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Detailed Guitar Pedal Power Supply Reviews
1. JOYO DC 9V Guitar Pedal Power Supply - Best Budget Daisy Chain
JOYO DC 9V Guitar Pedal Power Supply (800mA -1A) AC Wall Charger Adapter with 4 Way Daisy Chain Pedal Cables (8.8 FT), Compatible for Most Effect Pedals (Tip Negative)
Output: 800mA
Connections: 4 pedals
Cable: 8.8 ft
Type: Daisy chain
What We Like
- Under $12
- 1K+ monthly buyers
- Long 8.8ft cable
- 800mA capacity
What We Don't Like
- No isolation
- Potential noise
- Limited outputs
The JOYO DC 9V delivers surprising value at just $11.69, powering up to four standard 9V pedals through its daisy chain design.
With 800mA total output, this adapter handles most analog pedals like overdrives, distortions, and simple modulation effects without breaking a sweat.
The 8.8-foot cable length solves a common problem - reaching distant wall outlets from your pedalboard position.
Over 1,700 guitarists rate this 4.6 stars, with many praising its reliability for practice setups and small boards.
What Users Love: Incredible price point, long cable reach, reliable for basic setups
Common Concerns: No isolation between pedals, can introduce noise with digital pedals
2. Donner DP-1 Guitar Power Supply - Best Value Isolated Power
Donner DP-1 Guitar Power Supply 10 Isolated DC Output for 9V/12V/18V Effect Pedal
Outputs: 10 isolated
Current: 100mA x7, 500mA x3
Voltage: 9V/12V/18V
Noise: Ultra-low
What We Like
- True isolation
- Multiple voltages
- Under $35
- 5K+ monthly buyers
What We Don't Like
- 100mA limits
- Larger footprint
At $33.99, the Donner DP-1 offers professional-grade isolated outputs at a fraction of premium prices.
Each of the 10 outputs provides true electrical isolation, eliminating ground loops and the dreaded 60-cycle hum that plagues daisy chain systems.
Seven outputs deliver 100mA (perfect for most pedals), while three high-current outputs provide 500mA for power-hungry digital effects and loopers.
The ability to switch between 9V, 12V, and 18V on certain outputs gives you headroom options for different pedal requirements.
With over 7,600 reviews averaging 4.5 stars and 5,000+ monthly purchases, this has become the go-to choice for intermediate players upgrading from daisy chains.
What Users Love: True isolation at budget price, versatile voltage options, handles most pedalboards
Common Concerns: 100mA outputs insufficient for some modern digital pedals
3. Donner DPA-1 Guitar Pedal Power Supply - Most Popular Basic Supply
Donner DPA-1 9V DC 1A Power Supply Adapter for Electronic Keyboard, Digital Piano & Guitar Pedals, Tip Negative AC Adapter with 5-Way Daisy Chain Cable for Effects Pedal & MIDI Controller
Output: 1000mA total
Connections: 4-way daisy
Cable: Standard length
Sales: 10K+ monthly
What We Like
- 10K+ monthly buyers
- 1000mA capacity
- $16 price
- Proven reliability
What We Don't Like
- No isolation
- 4 pedals max
- Noise potential
The Donner DPA-1 dominates Amazon's pedal power category with over 10,000 monthly purchases and 10,365 total reviews.
This straightforward daisy chain adapter provides 1000mA total current through four outputs, enough for most analog pedalboards.
At $15.99, it hits the sweet spot between the ultra-cheap adapters that fail quickly and expensive isolated units.
The massive sales volume speaks to its reliability - this is the adapter guitar stores recommend for beginners.
What Users Love: Proven track record, sufficient power for most needs, excellent value
Common Concerns: Daisy chain limitations, not suitable for noise-sensitive or high-current digital pedals
4. D'ADDARIO 9-Volt Power Adaptor - Bestselling Single Pedal Solution
D'Addario Accessories PW-CT-9V DC Power Adapter – Pedalboard Supply - For Pedal Board and Other Devices Requiring 9V – 800mA Max Current
Output: 300mA
Type: Single pedal
Brand: D'Addario
Sales: 20K+ total
What We Like
- 20K+ satisfied users
- Trusted brand
- Perfect for one pedal
- Compact design
What We Don't Like
- Single output only
- 300mA limit
- No daisy option
With over 16,000 reviews and 20,000+ monthly buyers, the D'Addario adapter is the most popular single-pedal solution on the market.
This no-frills 300mA adapter excels at its simple job - reliably powering one pedal without complications.
D'Addario's reputation for quality strings extends to their accessories, with this adapter showing exceptional durability.
At $12.99, it's the perfect solution for guitarists with just one or two favorite pedals who don't need a complex power system.
What Users Love: Rock-solid reliability, trusted brand, perfect for simple setups
Common Concerns: Limited to one pedal, 300mA won't power digital effects
5. Voodoo Lab Pedal X8 - High Current Professional Choice
Voodoo Lab Pedal X8 High Current Power Supply (PPX8)
Outputs: 8 isolated
Current: 500mA each
Total: 4000mA
Price: $169.99
What We Like
- 500mA per output
- True isolation
- Professional grade
- Voodoo Lab quality
What We Don't Like
- Higher price
- Larger size
- Overkill for basic boards
The Voodoo Lab X8 delivers 500mA to each of its eight isolated outputs, making it ideal for modern digital-heavy pedalboards.
This $169.99 unit provides enough current to power demanding pedals like Strymon, Eventide, and Boss multi-effects without breaking a sweat.
Voodoo Lab pioneered isolated pedal power supplies, and their expertise shows in the X8's dead-silent operation.
Professional musicians choose this for its bulletproof reliability and ability to handle any pedal combination.
What Users Love: Handles any pedal, tour-ready reliability, silent operation
Common Concerns: Price point, size may not fit under all pedalboards
6. MXR DC Brick Power Supply - Classic MXR Reliability
MXR® DC Brick™ Power Supply
Outputs: 8 total
Current: 375mA shared
Brand: Dunlop/MXR
Price: $99.99
What We Like
- MXR/Dunlop quality
- Compact design
- 8 outputs
- $100 price point
What We Don't Like
- Shared ground
- Limited current
- Not fully isolated
The MXR DC Brick has powered professional pedalboards for over a decade, earning its reputation through consistent performance.
At $99.99, this Dunlop-manufactured unit bridges the gap between budget adapters and premium isolated supplies.
Eight outputs share 375mA total current, which works well for analog-heavy boards but struggles with power-hungry digital effects.
Over 1,300 guitarists rate it 4.6 stars, appreciating its compact brick design that fits easily under most pedalboards.
What Users Love: Proven track record, MXR build quality, good middle-ground option
Common Concerns: Not fully isolated, shared current limiting, newer options offer more features
7. JOYO JP-02 Guitar Pedal Power Supply - Versatile Voltage Options
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)
Outputs: 8 isolated
Voltage: 9V/12V/18V
Current: 100mA each
Price: $32.99
What We Like
- Multiple voltages
- True isolation
- Under $35
- Compact design
What We Don't Like
- 100mA limits
- Basic features
- Chinese brand
JOYO's JP-02 packs impressive features into a $32.99 package, including true isolation and multiple voltage options.
Eight isolated outputs prevent ground loops, while switchable 9V/12V/18V settings accommodate various pedal requirements.
Each output provides 100mA, sufficient for most analog pedals and many digital effects in standard operation.
With 873 reviews averaging 4.6 stars, users appreciate getting isolated power and voltage flexibility at this price point.
What Users Love: Voltage versatility, true isolation under $35, handles diverse pedalboards
Common Concerns: 100mA per output limiting for some pedals, basic documentation
8. 1 SPOT Pro CS6 - Low Profile Professional
Truetone 1 SPOT Pro CS6 Low Profile Guitar Pedal Power Supply with 6 Isolated Outputs, 9V 12V 18V, Studio Power for Your Pedalboard
Outputs: 6 isolated
Current: 500mA each
Height: 1.2 inches
Price: $169.99
What We Like
- Fits under any board
- 500mA per output
- Silent operation
- Truetone quality
What We Don't Like
- Only 6 outputs
- Premium price
- May need expansion
The Truetone 1 SPOT Pro CS6 solves a critical problem - fitting professional-grade power under low-profile pedalboards.
At just 1.2 inches tall, this $169.99 unit slides under virtually any pedalboard while delivering 500mA to each of six isolated outputs.
Truetone's switching technology eliminates transformer hum completely, providing studio-quiet operation even with high-gain pedals.
With a 4.8-star rating from 335 users, this has become the go-to choice for touring musicians with space constraints.
What Users Love: Incredibly thin profile, dead silent, handles any pedal type
Common Concerns: Limited to 6 outputs, price comparable to units with more outputs
9. Voodoo Lab PedalPower 3 PLUS - Premium Digital Power
Voodoo Lab Pedal Power 3 PLUS High Current 12-Output Isolated Power Supply
Outputs: 12 isolated
Current: 500mA each
Technology: Digital
Price: $279.99
What We Like
- 12 high-current outputs
- Digital regulation
- Tour-grade build
- Voodoo Lab legacy
What We Don't Like
- $280 price
- Large footprint
- Overkill for hobbyists
Voodoo Lab's PedalPower 3 PLUS represents the pinnacle of pedal power technology with advanced digital voltage regulation.
Twelve isolated outputs each provide 500mA, enough total power for the most elaborate professional pedalboards.
Digital control ensures each output maintains exact voltage regardless of load, critical for consistent pedal performance.
At $279.99, this is an investment for serious players who need absolute reliability and unlimited expansion capabilities.
What Users Love: Handles any pedalboard configuration, tour-proven reliability, future-proof design
Common Concerns: Significant investment, larger than most power supplies
10. Strymon Zuma - Expandable Pro System
Strymon Zuma 9-output Guitar Pedal Power Supply
Outputs: 9 isolated
Current: 500mA each
Expandable: Yes
Price: $279.00
What We Like
- Modular expansion
- 500mA per output
- Strymon quality
- Ultra-quiet
What We Don't Like
- Premium pricing
- Expansion costs extra
- Complex for beginners
Strymon's Zuma offers a unique expandable design that grows with your pedalboard needs over time.
Nine outputs each deliver 500mA of ultra-clean power, with the option to add Ojai expansion units for more outputs.
The $279 price reflects Strymon's obsessive attention to noise reduction and voltage stability.
This modular approach makes sense for players who start with a medium board but plan to expand.
What Users Love: Expandability option, Strymon build quality, dead-silent operation
Common Concerns: High initial cost, expansion units add expense, complexity for simple needs
How to Choose the Best Guitar Pedal Power Supply?
Selecting the right power supply depends on your pedalboard size, pedal types, and noise tolerance.
Isolated vs Daisy Chain Power
Isolated outputs give each pedal its own ground connection, eliminating the hum and buzz that ruins your tone.
Daisy chains share a common ground between all pedals, which costs less but often introduces unwanted noise.
I recommend isolated power if you use any high-gain pedals, digital effects, or record professionally.
Understanding Current Requirements
Most analog pedals like overdrive and fuzz draw 20-50mA, while digital delays and reverbs need 100-300mA.
Check each pedal's current draw (usually printed on the bottom) and add 20% headroom for safety.
A typical 5-pedal board with mixed analog and digital effects needs about 500-800mA total capacity.
Voltage Compatibility
Standard pedals run on 9V, but some vintage-style fuzzes want 12V while certain preamps need 18V for extra headroom.
Multi-voltage supplies like the Donner DP-1 let you optimize each pedal's performance with appropriate voltage.
Never exceed a pedal's voltage rating - this will permanently damage the electronics.
Physical Size Considerations
Measure the clearance under your pedalboard before buying - many boards only have 1.5-2 inches of space.
The 1 SPOT Pro CS6 at 1.2 inches tall fits where others won't, crucial for low-profile boards.
Consider mounting brackets if your power supply doesn't fit underneath.
Frequently Asked Questions
Do I really need an isolated power supply?
Isolated power supplies are essential if you experience hum, buzz, or noise in your signal chain. They're also necessary for mixing digital and analog pedals, using high-gain effects, or recording professionally. For simple setups with 2-3 analog pedals, a quality daisy chain often works fine.
How many milliamps (mA) do I need for my pedalboard?
Add up the current draw of all your pedals (listed on each pedal) and add 20-30% overhead. Most analog pedals use 20-50mA, while digital effects need 100-300mA. A typical 5-pedal mixed board requires 600-800mA total.
Can I use a higher mA output than my pedal requires?
Yes, absolutely. A pedal only draws the current it needs. Using a 500mA output for a 100mA pedal is perfectly safe and provides plenty of headroom. Never exceed the voltage rating though - that will damage your pedal.
Why is my pedalboard still noisy with isolated power?
Check your cables first - bad patch cables cause more noise than power issues. Also verify you're using isolated outputs correctly (one pedal per output) and that your pedals are properly grounded. Some vintage pedals are naturally noisy regardless of power quality.
Can I daisy chain from an isolated output?
Yes, you can daisy chain multiple low-current analog pedals from a single isolated output if the total current draw doesn't exceed that output's rating. This maintains isolation from other outputs while maximizing your power supply's capacity.
What's the difference between 9V, 12V, and 18V for pedals?
Most pedals run on 9V standard. Some pedals accept 12V or 18V for increased headroom, which means cleaner tone at higher volumes. Always check your pedal's specifications - using the wrong voltage can cause permanent damage.
Final Recommendations
After testing all 10 power supplies with various pedalboard configurations, clear winners emerged for different needs.
The Donner DP-1 at $33.99 offers the best overall value with 10 isolated outputs and multi-voltage capability.
Budget-conscious players should grab the Donner DPA-1 for $15.99 - it reliably powers up to 4 analog pedals.
Professionals needing maximum flexibility should invest in the 1 SPOT Pro CS6 or Voodoo Lab systems.
Remember that clean power is the foundation of great tone - don't let a cheap adapter ruin your carefully crafted sound.
Hey, My name is Charles Eames, I am a designer, filmmaker, and lover of photographic arts. And I usually write about movies, Famous/Influential People. I am running this blog with my girlfriend Bernice.