Overview

The Spaceman Effects Mercury IV was created to give you even more out of what you already love about your sound and to be extremely reactive to your instrument, your pickups and your playing dynamics. It includes a tone-shaping section with independent High and Low toggle switches, which are interactive with the Boost and Harmonic controls. Together you can dial up to 35db of boost, tube-like even-order harmonic distortion, and multiple shades of treble boost, mid boost, bass boost or full boost.

Product Specs

Brand
Model
  • Mercury IV Germanium Harmonic Boost
Finish
  • Black Edition
  • Black/Black Edition
  • Blue Edition
  • Brass Edition
  • Chrome Edition
  • Copper Edition
  • Moonrock Edition
  • Ruined Edition
  • Silver Edition
  • Vintage Copper
  • White Edition
  • White/White Edition
Year
  • 2010s
Made In
  • United States
Categories
Pedal Format
  • Standard

From the Price Guide

Reviews for the Spaceman Effects Mercury IV Germanium Harmonic Boost
17
Help another musician by sharing your experience!
  • Sweet Jesus!

    Verified Purchase

    The pedal performs just as advertised, and man does it sound sweet.

  • Sold out. Buy now

    Verified Purchase

    So good I bought two more as soon as I tested it. My set up....PRS Paul's Amp 100.....Marshall Power Brake....Les Paul custom shop 58R......closed back 4x12 full size cab.....I love the boost section, but you can run this unit with the boost turned all the way down. Amazing how rich harmonics sound.…

  • Exceptional end of chain boost

    I think this pedal works best at the end of the signal chain just before the amp. Others use it differently, but used like this takes advantage of the massive input headroom, and the EQ switches are effectively like having 9 different amps to plug into! Further, the "harmonics" control means you can…

  • Best most versatile boost on the market

    Verified Purchase

    Best boost on the market period! At low boost setting makes a clean amp just sound better, really can’t explain. Run the boost at 11 on both knobs through a low watt amp on the edge of break up and you are in tone heaven! Worth the price of admission. Tempting to sale because of resale value but it would be difficult to find another pedal as versatile and sweet sounding.

  • The Hype is Mostly True

    Although I didn't ultimately make a permanent home on my pedalboard for this beauty of a box, the reviews and hype is pretty much accurate. There are TONS of tones in this box, but subtle and not-so. Really fun to play with, although it overlaps with alot of other boosts / ODs / EQs.

More Information

The Mercury IV was created to give you even more out of what you already love about your sound. While specifically designed for your electric guitar and your tube amps response, the Mercury IV is also a great tone enhancer for everything from bass to synth and really whatever else.

The Mercury IV includes a tone-shaping section with independent High and Low toggle switches, which are interactive with the Boost and Harmonic controls. Together you can dial in multiple shades of treble boost, mid boost, bass boost or full boost.

The Harmonics control blends in light, tube-like even-order harmonic distortion based on your input signal. This can also add octave-like overtones to your solos or unique textures to your chord work. It's extremely reactive to your guitar, your pickups and your playing dynamics.

Should you be looking for a clean lift off the Mercury IV provides 35db of boost gain, enough to quickly overdrive the front end of a tube amp. Due to the extreme gain presence in this device, Spaceman has suggested to proceed with caution and pack some earplugs.

The Mercury IV is compatible with any standard DC9V adapter. If that’s not your thing, you can remove the four screws on the bottom of the pedal for easy battery access. Top it all off with true-bypass switching and the Mercury IV is ready to expand the gravity of your sound, offering up the best results at the end of your signal chain.

The Mercury IV comes in 12 different limited editions: Silver (222 produced), Black (150 produced), Moonrock (99 produced), Vintage Copper (88 produced), White on White (77 produced), Brass (66 produced), White (55 produced), Ruined (44 produced), Chrome (33 produced), Copper (9 produced), Blue (5 produced), and Black on Black (5 produced). The Vintage Copper Edition is distinguished by a textured, semi-matte Copper Finish, while the Copper Edition is fully reflective and uses burgundy knobs. The Brass Edition also uses burgundy knobs but is a metallic powder coat instead of a metal plated finish. The Silver Edition and Ruined Editions are also similar, with the Ruined being a darker gray color, with silver topped knobs, as opposed to the single color knobs found on the Silver Edition.