Strymon Zuma R300
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Information
Information
Manufacturer Information
Strymon
https://www.strymon.net
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Guitars Rebellion SARL
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A Strymon Reference Designed for Demanding Rigs
The Strymon Zuma R300 is part of a high-end approach to pedalboard power supplies: delivering steady voltage, limiting interference, and preserving the sonic behavior of effects. Built in a compact chassis, it combines high current capacity and advanced architecture while remaining suited to the real constraints of a modern pedalboard (space, wiring, scalability).
For Whom and What Uses?
The Zuma R300 is aimed at guitarists and bassists seeking a reliable and silent power supply, both in the studio and on stage. It is particularly suitable for setups mixing multiple digital and analog pedals, or for any musician dealing with noise, hum, and ground loops. Thanks to its high-current outputs, it is equally comfortable powering a compact pedalboard or a larger, expanding rig.
Technologies and Design: Silence, Isolation, and Scalability
Double Isolation: End of Unwanted Noise
The fully analog circuit of the Zuma R300 is designed around double isolation to eliminate common issues related to ground loops and AC line noise. The result: your pedals receive clean power, and you maintain a clearer, more stable signal that stays true to what your effects are meant to deliver.
A Switching Power Supply Designed for Audio Quality
Strymon relies here on an advanced architecture: two-stage topology, pre-regulated outputs, optically isolated feedback, and multi-stage filtering. The goal is clear: ensure steady voltage, reduce noise, and allow your pedals to express their dynamic range to the fullest, even in challenging electrical environments.
Ultra-low Profile: Easy Integration Under the Pedalboard
Its ultra-flat design is intended for installation: the Zuma R300 can slide under almost any pedalboard, and the integrated threaded hardware simplifies mounting. A real plus for keeping a clean pedalboard, avoiding loose cables, and securing power during transport.
A System That Grows With Your Pedalboard
Need more outputs? The Zuma R300 is part of an expandable system: the 24V Thru jack allows adding a Strymon Ojai or Ojai R30 module (sold separately). A practical solution to evolve your rig without starting from scratch.
Technical specifications
| Category | Multiple power supply | Color | Blue |
| Number of outputs | 5 | Nominal mode power consumption (Wh) | 36 W |
| 1 adjustable output | 9V (500mA), 12V (375mA), or 18V (250mA) DC | Ultra-flat design | fits under almost any pedalboard |
| Maximum power | 36W | ||
Questions frequently asked
How many pedals can the Strymon Zuma R300 power?
This power supply features 5 outputs to power the pedals on a pedalboard.
What voltage is available on the adjustable output?
An adjustable output delivers 9 V / 500 mA, 12 V / 375 mA, or 18 V / 250 mA DC.
Does the Zuma R300 reduce hum and ground loops?
Its analog circuit with double isolation is designed to limit ground loops and AC line noise. The architecture includes optically isolated feedback and multi-stage filtering. Pedals thus benefit from a regulated voltage.
Can it be installed under a pedalboard?
Its ultra-flat design is made to slide under almost any pedalboard. The integrated threaded hardware makes mounting easy.
How can additional outputs be added to this Strymon power supply?
The 24 V Thru jack allows connection of a Strymon Ojai or Ojai R30 module, sold separately.
