The Greer Amps Peacemaker is a drive-meets-distortion pedal built around vintage old school transistors. Greer's own description of the idea is simple: run one old school transistor based gain stage into another one, and use them together as a drive-meets-distortion preamp1. Guitar Pedal X, covering the pedal's 2026 reissue, called the vintage old school transistors the core of the pedal2.
What it does to your sound
Greer describes the Peacemaker as one of those fun pedals that can do a slight "vintage feeling and sounding" EQ shift with boost capabilities, or push into drive-meets-distortion territory1. Guitar Pedal X characterizes it as a very much transistor drive-distortion sound with a very unique and fun character, and notes it is seemingly mostly intended for pushing into the front of a tube amp2. In other words, at low settings it behaves like a colored boost that shapes the amp's response; turned up, the two gain stages do the distorting themselves.
Pedal of the Day's reviewer, Mike B, found the two stages flexible in how you combine them4:
"The Power and Preamp knobs represent two unique gain stages, and work well solo or running together."
He also wrote that the pedal is capable of doing a great clean boost if you want it to, which puts the low end of its range in clean boost territory4. At the other end of its range it sits among distortion pedals, and Pedal of the Day's listing titles it the Peacemaker Dual Class A Transistor Distortion3.
Controls
The pedal keeps things minimal, with two knobs2:
| Control | What it does |
|---|---|
| Power | One of the two gain stages, usable on its own or stacked into the Preamp stage4 |
| Preamp | The second gain stage, run solo or into the Power stage4 |
Power
Greer states the pedal requires a 9 volt battery or 9 volt DC power supply, in the standard negative center pin configuration1. That is the common polarity for pedal supplies, so a standard 9 volt DC input or a battery both work.
History and the current limited run
Greer says it has built this pedal for about 20 years or so now, doing small batch runs here and there1. The current version is a limited reissue: Greer's product page says "We posted this on Instagram. Now folks want it…back for a bit. Not sure how long. Not sure how many."1. Guitar Pedal X reported the reissue on 14 October 2026 as a limited batch, this time with oxblood knobs, with the total number not referenced and limited by the vintage old school transistors used at the core of the pedal, at $229 from the Greer Amps webstore2.
The reissued Peacemaker is a limited batch, and Greer itself has not said how long it will stay available or how many exist1. An earlier version also differs in appearance: Mike B at Pedal of the Day noted "there seems to be an earlier version of this, a big, hand-painted(?) box with chicken knobs and hand-written text," and said he personally likes the deep gray color and compact size of the newer version4.
Where it sits in the Greer range
The Peacemaker is one of several drive and distortion pedals from Greer Amps. Others covered on this site include the Greer Amps Sucker Punch Distortion, the Greer Amps Green Giant, the Greer Amps Hammer, the Greer Amps Little Samson, the Greer Amps Gorilla Warfare MkII and the Greer Amps Black Mountain Crunch Drive. The Peacemaker's distinguishing feature among them is its two-stage all-transistor design and its dual role as a boost-capable preamp and a distortion124.
Videos
Pedal of the Day
Questions
Does the Greer Amps Peacemaker take a battery?
Yes. Greer Amps states the pedal requires a 9 volt battery or a 9 volt DC power supply, so it can run on either. A battery makes it easy to drop onto a small board or use without a supply, while a standard 9 volt DC pedal supply covers regular use.
What is the Peacemaker's power polarity?
Greer Amps specifies the standard negative center pin configuration for the 9 volt DC supply. That is the polarity used by most pedal power supplies and daisy chains, so a typical pedalboard power brick should work without an adapter or polarity reversal.
Can the Peacemaker be used as a clean boost?
Yes. Pedal of the Day's reviewer, Mike B, wrote that the pedal is capable of doing a great clean boost if you want it to. Greer also describes the pedal as able to do a slight vintage feeling and sounding EQ shift with boost capabilities, so low-gain boost is part of its range.
Is the Greer Peacemaker a limited edition?
The current version is a limited reissue. Guitar Pedal X reported it as a limited batch with oxblood knobs, with the quantity limited by the supply of the vintage old school transistors used at the core of the pedal. Greer itself says it is back for a bit, not sure how long, not sure how many.
How much does the Greer Amps Peacemaker cost?
Guitar Pedal X reported the reissued Peacemaker at $229 USD from the Greer Amps webstore as of October 2026. Greer's own product page lists it at £174.00 GBP, so the price depends on which store you are looking at.
What does the Peacemaker do to a tube amp?
Guitar Pedal X describes the pedal as seemingly mostly intended for pushing into the front of a tube amp. In practice that means using its transistor gain stages to drive the amp's input, either as a boost that shifts the EQ and pushes the amp harder or as a full drive-meets-distortion sound.
Sources (4)
- Peacemaker, Greer Amps
- Guitar Pedal X, Guitar Pedal X, 2026-10-14
- Greer Amps Peacemaker Dual Class A Transistor Distortion, Pedal of the Day, 2015-08-28
- Greer Amps Peacemaker Distortion, Pedal of the Day, 2015-09-26
