The Superlunar SR-01 is an analog saturation device from New York-based maker Superlunar: a fuzz pedal built on a two-stage transistor circuit that covers ground from subtle overdrive through distortion to full-blown fuzz1. RockBoard's PedalPedia says it is inspired by the destructive crunch of a legendary "Black Panel" amp overdriven, and that starving the second-stage transistor of power yields a gated "velcro" fuzz tone1.
The full-frequency circuit blends a selection of silicon diodes that produce soft clipping, and the audio path uses large capacitors that RockBoard's PedalPedia says let all the low-end through, creating a thick, warm guitar sound1. The maker also pitches it beyond guitar: the SR-01's full sound is described as perfect for bass, synths and drum machines, adding saturation, harmonics, compression and dirt1.
What the SR-01 does
The SR-01 is one pedal that spans several gain types. With the input attenuation set high and the bias control backed off, it works as a soft-clipped overdrive in the black-panel amp tradition; push the gain and it moves into distortion; engage the fuzz mode and starve the second-stage transistor of power, and it becomes a gated, spluttering velcro fuzz1.
Guitar.com's reviewer, Richard Purvis, found the starting-point setting "very pleasing medium-gain drive tone with plenty of body and chime. It's sweet, solid and thoroughly amp-ish"2. In fuzz mode he found it "mighty powerful, but still with a tightness and clarity that's definitely more black-panel than tweed"2.
"This is a very pleasing medium-gain drive tone with plenty of body and chime. It's sweet, solid and thoroughly amp-ish"
The low-end handling is a deliberate design point: the large capacitors in the audio path are what let the pedal work on bass and synths without thinning out1.
The controls
The control layout splits into two pairs of knobs and a set of push-buttons. Guitar.com describes the big knobs on the left as controlling gain in the first clipping stage and output level, with the three mini-knobs handling input attenuation, second-stage transistor bias and treble2. The push-buttons engage fuzz mode and a high-pass filter2.
Guitar Pedal X lists the full control set as follows4:
| Control | What it does |
|---|---|
| Q1 Gain | Gain in the first clipping stage |
| Volume | Output level |
| A] Attenuate Input | Input attenuation |
| C] Q2 Bias | Second-stage transistor bias |
| F] First Order Low Pass Filter | Treble roll-off |
| Blue Button | Fuzz / Distortion mode |
| White Button | Fixed high-pass filter |
The bias control is where the pedal's character lives. Guitar.com found it ranges from gently velcro-like textures to, bumped up further with the input level notched back, full-on gated splutter effects2. The input attenuation knob also changes the pedal's role: turned down to about two o'clock, or lower with humbuckers, it removes the crunch and lets the output level drive the amp front end as a boost2.
One build point worth knowing: Guitar.com's reviewer noted that the tall mini-knobs sit right by the footswitch and "look oh so vulnerable"2. On the same review's plus side, the design was called "possibly the smartest-looking stompbox in the world"2.
Power and bypass
The SR-01 runs on 9V DC with a center-negative plug and draws 22mA1, so it works with a standard pedalboard supply. It is true bypass3.
The center-negative 9V requirement is the common pedal standard, but check your supply's polarity before plugging in; the 22mA draw is low enough that the pedal shares an isolated output without strain1.
Availability and price
Guitar.com lists the SR-01 at $280 / £249 as of February 2026, and reports it is now available in the UK through Northern Stompboxes2. Guitar Pedal X, writing in December 2025, listed a UK price of £216 and availability through the Superlunar Webstore and Coast Sonic5; the two published UK prices differ, with the later figure being the higher one.
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Questions
Does the Superlunar SR-01 work on bass?
Yes. Superlunar says the SR-01's full sound is also perfect for bass, synths and drum machines, and the audio path uses large capacitors that let all the low-end through for a thick, warm sound. Guitar.com's reviewer also found the fuzz mode keeps a tightness and clarity that suits full-range instruments.
Is the Superlunar SR-01 true bypass?
Yes, the SR-01 is true bypass, as listed by Pedal of the Day. When it is switched out of the signal path, your dry guitar signal passes through without buffering or coloring.
What power supply does the Superlunar SR-01 need?
The SR-01 runs on 9V DC with a center-negative plug, drawing 22mA. A standard pedalboard power supply with a center-negative 9V output will run it, and its low current draw means it shares an isolated output easily.
Where is Superlunar based?
Superlunar is based in New York. Guitar.com describes the SR-01 as a versatile fuzz, drive and boost pedal from New York.
Where can I buy the Superlunar SR-01 in the UK?
Guitar.com reports the SR-01 is available in the UK through Northern Stompboxes. It is also sold through the Superlunar Webstore and Coast Sonic. UK pricing was listed at £216 in December 2025 and £249 in February 2026.
Sources (5)
- sr-01 - Analog Saturation Device by superlunar | RockBoard | PedalPedia, RockBoard (rockboard.de PedalPedia), 2026
- Superlunar SR-01 review, Guitar.com, 2026-02-09
- superlunar sr-01 transistor-based analog saturation device, Pedal of the Day, 2026-01-15
- Guitar Pedal X, Guitar Pedal X, 2025-12-04
- Guitar Pedal X, Guitar Pedal X, 2025-12-03
