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Spaceman Mercury IV / Germanium Harmonic Boost (Vintage Copper Edition)


We are excited to present the Mercury IV, a unique Germanium Harmonic Boost pedal.  Eight years ago, we introduced the Mercury III and we have updated the original circuit for a new spin on that classic pedal.

The Mercury IV is a dynamic tone enhancer, created to bring out additional harmonic character from instruments and amplifiers.  The pedal features a unique, discrete analog circuit, with a meticulously selected vintage germanium transistor at its heart.

The Boost control of the Mercury IV offers a staggering 35 dB of gain, with nine (9) tone-shaping options via two toggle switches, to gently or aggressively boost tube amplifiers.  The real magic however, resides in the Harmonics control; bringing more dimension and life to ones’ tone.  Subtle sparkle, complex textures, and octave-like overtones can all be found here.  With a sound and response like hot tubes on the edge of breakup, these even-order harmonics are independently generated, giving you full control over the mix.

The Mercury IV is completely hand-soldered and handmade in Portland Oregon to the highest degree of quality possible.  These are truly artisan-crafted tone devices, sparing no detail within or without.  The Mercury IV utilizes true-bypass switching via the heaviest duty mechanical footswitch available, while your tone is transferred via quality open-frame Switchcraft jacks.  Open one up and you’ll see an unparalleled display of craftsmanship; with immaculate hand-soldered PCB, detailed military-spec wiring, and custom Spaceman heavy-duty battery connector.  On top of the cast aluminum enclosure sits a durable, engraved vinyl faceplate and jewel indicator light.  This pedal is truly built to last a lifetime.

Each pedal number is hand-hammered on the nameplate, stating its limited availability and each is also signed and numbered on the inside.

  • The first run White, Brass Metallic, Chrome and Copper Editions feature germanium transistors from the same vintage stock as the original Mercury III

Brand: Spaceman


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