Spaceman Effects Saturn V Harmonic Booster

The Spaceman Effects Saturn V is a two-knob pedal that Spaceman describes as "a tone enhancer, a harmonic-laden boost, and low-gain overdrive"¹. Reviewers have found it covers a big sonic range for a pedal with only two knobs, running from clean boost to impressive overdrive². As one reviewer put it, "Not to mention it sounds simply incredible"². Its look gets as much attention as its sound: the same reviewer called it "the cleanest, slickest, futuristic-looking pedal I have ever had the opportunity to play," and noted that "the huge, diamond-looking turquoise LED is pretty sweet as well"².

Spaceman Effects builds the Saturn V in Portland, Oregon, in limited editions with various finishes³. The maker's product page lists it as sold out as of October 2026¹.

What it does to your sound

The Saturn V is not a conventional clean boost. Pedal of the Day's Mike B called it "very different from a normal boost pedal, and it's not quite an overdrive, either," describing the Boost signal as "so deep, clear and rich, and adds such a powerful presence to your tone"². The Drive side is a low-gain affair: "Don't expect any metal-ish distortion here, just a great tube-y overdrive sound"².

Premier Guitar's 2023 review found the pedal could go further than its two knobs suggest. With gain and volume cranked together, the reviewer wrote that "the Saturn V not only generates a wall of wide-spectrum, harmonically rich distortion"⁴. The same review praised how the pedal reacts to playing style, calling it "super-responsive to picking dynamics and volume- and tone-knob manipulation"⁴.

The Boost and Drive knobs

The pedal keeps its control set to two knobs, and each covers a distinct range of gain²¹⁴:

Spaceman Effects states that the Boost control alone delivers 18 dB of boost, and that cranking both controls to max yields 35 dB of boost full of complex harmonic character¹. Premier Guitar's review confirms both figures, noting "the boost knob adds up to 18 dB" and that "you can get a summed boost of 35 dB between the two"⁴.

Power and construction

The Saturn V runs on a 9V DC input and includes a custom heavy-duty battery connector, so it can be powered either way¹. Premier Guitar's reviewer spotted the attention to detail inside, noting "the little Saturn and stars logo on the battery contact sheath"⁴.

Build quality was a consistent theme in reviews. Premier Guitar called the enclosure "hefty and built to what NASA would call mission-critical standards of durability," with an Apollo-capsule-control-panel design⁴. Pedal of the Day described the internals as "truly something to behold, so intricate and precise, all hand-wired"², and noted the large turquoise LED on the face of the pedal².

Where it came from and where it went

The Saturn V line continued after the original. In 2019, Spaceman turned the follow-up Saturn VI into an always-available Standard Edition pedal, an update to the 2012 Saturn V that added a Tone knob. The Saturn V's harmonic-boost concept also runs through other Spaceman pedals, including the Mercury III, the Redstone 3-band EQ germanium preamp/overdrive, and the Atlas III preamp booster.

What reviewers said

Both published reviews were positive about the sound despite the minimal control set. Pedal of the Day's Mike B found "big sonic range from clean boost to impressive overdrive" across only two knobs, concluding that "it sounds simply incredible" and calling it "the cleanest, slickest, futuristic-looking pedal I have ever had the opportunity to play"². Premier Guitar's reviewer highlighted the pedal's responsiveness to picking dynamics and guitar controls as a standout trait⁴.

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