Guitar Pedal Power Supplies
Eliminate unwanted hum, ground loops, and power failures from your signal chain. Our curated collection of pedal power supply guitar models represents the ultimate destination for gigging guitarists, pedalboard builders, and studio session players—where absolute electrical isolation meets road-tested reliability. Whether you are looking for a highly robust guitar pedal ac power supply to run your high-draw digital pedals or the best pedalboard power supply to mount underneath your board, we offer an exceptional range. Find your perfect power solution with hand-selected pedalboard isolated power supply models from industry-leading brands like Strymon, Voodoo Lab, Truetone, and Cioks.
Because your performance relies on rock-solid gear, every single guitar effects power supply we sell undergoes a rigorous quality inspection and safety check by our expert techs in our Huntingdon showroom before shipping, ensuring flawless, noise-free performance straight out of the box.
✓ 100% Isolated Power Outputs ✓ Free UK Delivery over £99 ✓ Professional Tech Support Included
Explore Guitar Pedal Power Supplies at MusicStreet
1 Spot PSU 9v
Blackstar - Fly Psu
1 Spot PSU 9v Combo Pack
Dunlop ECB003UK 9v adapter
Mxr M237 Dc Brick
Strymon Zuma Multi Power Supply
Strymon Ojai Power Supply
1 Spot pro CS7
Strymon R300 Zuma Power Supply
The Foundation of Silent Tone: Why Isolated Power is Crucial
Many guitarists spend thousands of pounds on premium guitars, amplifiers, and boutique pedals, only to power them with a cheap, non-isolated daisy chain. This is the primary cause of ground loop hum, high-frequency digital whine, and inconsistent pedal performance. A true isolated power supply features independent transformers (or custom-shielded switching networks) for every single output. This completely isolates each pedal's electrical ground, eliminating ground loops and keeping your signal path whisper-quiet.
Furthermore, modern digital pedals (like Strymon, Eventide, and Line 6) have high current draw requirements, often needing 300mA to 500mA of current. Under-powering these units can cause them to glitch, reboot, or sound thin. A professional power supply allows you to manage both current draw and varying voltage requirements (such as 9V, 12V, or 18V) safely and efficiently.
🔧 Rigorous Inspection
Every power supply is thoroughly tested, voltage-verified, and safety-checked by our in-house technicians before being listed for sale.
🛡️ 12-Month Warranty
We stand behind every product we sell. All of our power units come with a full 12-month warranty, giving you complete peace of mind with your purchase.
🚚 Free UK Delivery & 14-Day Returns
Get free, fully insured UK shipping on all orders over £99. If the power supply isn't the perfect fit for your board, return it to us within 14 days for a hassle-free refund or exchange.
Advanced Features: Voltage Sag & High-Current Outputs
Some premium power supplies feature a voltage sag control on select outputs. This allows you to manually sweep the voltage down from 9V to around 4V, emulating the sound and feel of a dying carbon-zinc battery. This is highly prized by tone purists for vintage fuzz and overdrive pedals, introducing a unique, warm compression and "spitty" texture that is impossible to replicate with stable power.
Top Power Supplies in Our Collection
We are proud to stock the industry's most reliable and technologically advanced power solutions:
Strymon Zuma & Ojai
The ultimate high-current powerhouses. The Strymon Zuma features 9 high-current, individually isolated outputs (each delivering 500mA at 9V), with two outputs switchable between 9V, 12V, and 18V. For smaller boards or modular expansion, the ultra-compact Strymon Ojai delivers 500mA across 5 isolated outputs in a lightweight, low-profile chassis.
Voodoo Lab Pedal Power
The industry standard. The Voodoo Lab Pedal Power series (including the Pedal Power 3 and 3 Plus) is celebrated for its rugged, road-ready reliability and organic, linear power delivery. Featuring hybrid DC transformer designs and specialized voltage sag controls, it remains a favorite for touring professionals.
Truetone 1 Spot Pro
Incredible versatility and value. The Truetone 1 Spot Pro series (such as the CS7 and CS12) utilizes advanced switching technology to deliver massive current across a wide variety of isolated outputs, including dedicated 18V and AC outputs, making it a true Swiss Army knife for complex boards. Explore our used range in our Pre-Owned Collection or view our parent Electric Guitars collection.
Guitar Trade-In & Part-Exchange Program
Ready to upgrade your current pedalboard? We make it incredibly easy to trade in your pre-owned gear. Through our straightforward guitar part-exchange program, you can bring your old guitar, amplifier, or effects pedals into our showroom (or send us details online) and put its value directly toward any new or used gear in our store.
Visit Our Huntingdon Guitar Showroom
If you are searching for premium guitar shops in Cambridgeshire, come visit our showroom in Huntingdon. Located at 10 Chequers Court, our showroom features a dedicated electric guitar and amplifier room where you can sit back, play, and compare different neck profiles, scale lengths, and pickup configurations side-by-side. We are easily accessible from Cambridge, Peterborough, and Bedford, with convenient parking nearby.
Frequently Asked Questions About Pedal Power Supplies
What is an isolated power supply and why do I need one? +
A pedalboard isolated power supply features independent electrical circuits and transformers for each output. This prevents the electrical grounds of your pedals from connecting, which completely eliminates ground loop hum and high-frequency digital noise. Non-isolated daisy chains share a common ground, which acts as an antenna for interference and noise.
What is current draw (mA) and how does it affect my pedals? +
Current draw (measured in milliamperes, or mA) is the amount of electrical current a pedal requires to operate. Analog pedals (like overdrives) typically have low current draw (under 20mA), while modern digital pedals (like delays, reverbs, and modelers) have high current draw (often 300mA to 500mA). You must ensure that the output on your power supply delivers *at least* the mA required by the pedal, or the pedal may glitch, reboot, or fail to turn on.
What is voltage sag and when should I use it? +
Voltage sag is a feature found on select outputs of premium power supplies (like the Voodoo Lab Pedal Power) that allows you to manually lower the voltage from 9V down to around 4V. This emulates the sound and feel of a dying battery, which introduces a unique, warm compression, soft clipping, and "spitty" texture to vintage analog fuzz and overdrive circuits. It should not be used on digital pedals.
Can I run a 9V pedal on 12V or 18V? +
You should *never* run a pedal at a higher voltage than it is rated for unless the manufacturer explicitly states it is safe to do so. Doing so can instantly blow the pedal's internal components. However, some analog overdrive and boost pedals are designed to run at either 9V or 18V; running them at 18V provides significantly more clean headroom, wider dynamic range, and a tighter low-end response.
The Importance of Isolated Power: The Foundation of Great Tone
What separates a noisy, buzzing pedalboard from a pristine, studio-quiet signal chain? While many players focus on buying premium cables and high-end pedals, professional studio engineers and touring guitarists know that the secret to a noise-free rig lies in the foundation of your power distribution.
Using a cheap daisy-chain power supply connects all of your pedals' power grounds together. This creates ground loops—the primary cause of the annoying high-pitched whine and hum that plagues many pedalboards, especially when combining digital pedals (like delays and reverbs) with analog dirt pedals.
A premium pedalboard isolated power supply features independent transformers for every single output. This completely isolates each pedal's electrical ground, preventing ground loops and ensuring your signal remains absolutely quiet, dynamic, and transparent.
Understanding Your Pedalboard's Power Requirements
To choose the correct power supply, you must understand three critical electrical specifications:
- Voltage (V): Most standard guitar pedals require 9V DC power. However, some specialized pedals require 12V, 18V, or even AC power. Running a pedal at the wrong voltage can permanently damage its circuitry or cause it to perform poorly.
- Current Draw (mA): Measured in milliamperes (mA). Analog pedals (like overdrives and phasers) typically have a very low current draw (under 20mA). Modern digital pedals (like the Strymon Timeline or Line 6 HX Stomp) have a very high current draw (300mA to 1000mA). Your power supply output must provide at least the amount of current your pedal demands.
- Polarity: The vast majority of guitar pedals use a center-negative barrel connector. Always verify the polarity of your pedals before plugging them in to prevent short-circuiting.
Explore the Pedalboard Power Lineup
1. Flagship Isolated Power Blocks (The Stage Giants)
The ultimate solutions for large, complex pedalboards. Flagship power supplies like the Strymon Zuma and Voodoo Lab Pedal Power 3 Plus feature multiple high-current, fully isolated outputs, built-in 12V/18V switching, and expandable links, allowing you to power massive, multi-pedal rigs cleanly and quietly.
2. Compact Isolated Power Blocks (The Fly-Rig Standards)
For players who demand maximum power in a compact footprint. Compact isolated blocks like the Strymon Ojai or Cioks 4 pack high-current outputs into ultra-slim, lightweight enclosures that mount easily underneath small pedalboards—perfect for fly-gigs and compact boards.
3. Utility Power Supplies (The Practice Standards)
The industry standards for simple, reliable practice setups. High-quality non-isolated power supplies like the Truetone 1 Spot are highly cost-effective, portable, and reliable solutions for powering a small chain of analog pedals at home or in rehearsals.
4. The MusicStreet Difference: Workshop-Prepared Reliability
At MusicStreet, we don't believe in "box shifting." A pedalboard power supply is a critical electrical device, and its reliability is critical to your performance.
Every single power supply that leaves our Huntingdon showroom undergoes a rigorous quality inspection and safety check by our expert techs. We verify all output voltages, test the current delivery under load, check the power cables and adapters, and perform a full electrical safety check. We ensure your new power supply runs quietly and performs flawlessly on stage or in the studio.
- No Drop-Shipping: Every power supply listed on our site is physically in stock at our Huntingdon store.
- 1-Year Warranty: We back every instrument, amplifier, and power supply we sell with a comprehensive 1-year warranty.
- Free UK Shipping: Enjoy free, fully insured UK shipping on all orders over £99, with competitive rates worldwide.
- Flexible Financing: Buy with confidence using Klarna or PayPal split payments.
5. Frequently Asked Questions (FAQs)
What is the difference between isolated and non-isolated power supplies?
Non-isolated power supplies (like daisy chains) share a common electrical ground across all outputs, which frequently causes ground loops, hum, and digital noise. Isolated power supplies feature independent transformers for every output, completely isolating each pedal's ground and eliminating noise.
Can I run an 18V pedal from a 9V power supply output?
No, unless the power supply features a dedicated 18V switchable output or you use a specialized voltage-doubling cable that combines two 9V outputs into a single 18V output. Always verify your pedal's voltage requirements before connecting power.
Does my power supply come tested?
Yes. Every power supply purchased from MusicStreet receives a professional, custom inspection and safety check in our in-house workshop before dispatch to ensure it runs quietly and performs flawlessly.
Can I try these power supplies in person?
Absolutely. We welcome you to visit our independent showroom at 10 Chequers Court, Huntingdon, Cambridgeshire. You can bring your own pedalboard, plug into our test power supplies, and get honest, expert advice from our team of working musicians.
