Joyo JP-04 Power Supply 4

$89.89 to $123.00

5.0 (2)

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Page last updated Jul 04, 2026

Pricing and availability

We compare 600+ stores and found this item at 3 stores. Prices updated June 26, 2026.

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$123.00

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$89.89

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5.0 (7)

$123.00 2 available New

$50.00 1 available Used

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Price History

Based on price data from 1 merchant for "Joyo JP-04 Power Supply 4". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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In the world of guitar pedals and effects, power is paramount. The Joyo JP-04 Power Supply 4 stands out with its completely isolated outputs, ensuring your sound remains pristine and free from interference. This power supply is designed for musicians who demand clarity and reliability, delivering consistent power to your pedalboard without the worry of strange noises or ground loops. Whether you're on stage or in the studio, the JP-04 provides each of its eight 9V outputs with independent power cables and ground wires, offering the highest level of protection against short-circuits and power inconsistencies. It's the perfect companion for those who want to focus solely on their music without technical distractions.

Key Features:

Eight completely isolated 9V outputs
Independent power cables and ground wires for each output
Protection against short-circuits and power inconsistencies
Eliminates noise and ground loops for clean sound

Product specs

Brand	Joyo
Model	JP-04 Power Supply 4
Finish	Black
Year	2010s
Categories	Pedalboards and Power Supplies

FAQs

Are the outputs on the Joyo JP-04 Power Supply 4 isolated?: Yes, the Joyo JP-04 features eight isolated 9V outputs. Each output is independently isolated, short-circuit and overcurrent protected, and highly filtered to ensure a clean power supply free from hum and noise.
Can the Joyo JP-04 Power Supply 4 eliminate ground loops in my pedalboard setup?: Yes, the Joyo JP-04 is designed to remove ground loops, providing a transparent sound without unwanted hum or noise, making it ideal for maintaining signal integrity in your pedalboard.
How many pedals can the Joyo JP-04 Power Supply 4 power simultaneously?: The Joyo JP-04 can power up to eight pedals simultaneously with its eight 9V isolated outputs, catering to a wide range of effects pedal setups.
Does the Joyo JP-04 Power Supply 4 fit under most pedalboards?: The Joyo JP-04 has a compact design that fits neatly under most pedalboards, making it a convenient and space-saving power solution for your effects pedals.
Is the Joyo JP-04 Power Supply 4 suitable for live performances?: Yes, the Joyo JP-04 is suitable for live performances, providing reliable and noise-free power to your pedals, ensuring your setup remains consistent and hassle-free during gigs.

Videos

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GuitarGodgt

Can you buy an isolated power supply for less than $100?

GuitarGodgt

Joyo Power Supply 4 (Review + Dicas)

Alexandre Almeida

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Joyo JP-04 Power Supply 4.

Features and functionality

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The Joyo JP-04 uses a kettle lead for power, suggesting a more robust construction compared to wall wart-powered units.
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It's suggested that if a power supply uses a DC wall wart, it's likely not fully isolated, which may apply to the Joyo JP-04.
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The Joyo JP-04 features cool blue LEDs that create a visually appealing effect when mounted under a pedalboard.
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Comparisons

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The Joyo JP-04 is often compared to the Donner DP3 Iso8 Plus and Truetone 1Spot CS-7, with some users still recommending it despite debates over isolation.
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The JP-04 is compared to Voodoo Labs Power Plus 2, with some believing it to be a good clone despite the price difference.
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A multimeter test video suggests Joyo JP-04 outputs may be isolated, offering a potential advantage over the MXR M237 for budget-conscious buyers.
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MXR M237 is critiqued for not being isolated, making it only slightly better than daisy-chaining wall plugs and less cost-effective than the Truetone CS-7.
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User experience

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Several owners report that the Joyo JP-04 operates quietly, with minimal noise issues, even if it may not be fully isolated.
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Some users report needing to power cycle the JP-04 multiple times upon plugging in, indicating potential minor reliability quirks.
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Some users express concern about Joyo being a knockoff brand, questioning its reliability in protecting pedals like the Dunlop 95q from damage.
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The MOSKEY ISO 10 is highlighted as another affordable isolated power supply option, suggesting similar units might exist under different brand names.
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Build quality

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Users note that the Joyo JP-04's enclosed box design enhances its durability over simpler daisy chain solutions.
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While generally reliable, one owner describes the JP-04 as "kind of janky," suggesting some variability in quality.
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Use cases and applications

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The JP-04 effectively powers standard pedals but may struggle with more power-intensive digital pedals like the Flashback X4 or El Capistan.
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