Pricing and availability

We compare 600+ stores and found this item at 9 stores. Prices updated .

Sweetwater
4.0 (12)
$151.50
Guitar Center
5.0 (1)
$151.50
Amazon
3.7 (48)
$151.50
Reverb
4.0 (21)
$106.78 New
$75.00 Used
Gear4Music
£123.25

Average Price: $138

Budget/Beginner

$150

$601+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 6 merchants for "Electro-Harmonix Guitar Mono Synth". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Unlock a world of sonic possibilities with the Electro-Harmonix Guitar Mono Synth. This innovative guitar pedal transforms your six-string into a vintage-inspired mono synth without the need for special pickups or MIDI devices. Packing a punch with 11 distinct synth sounds, from pulsating string-like tones to aggressive resonant waves, the Mono Synth brings a kaleidoscope of textures to your fingertips. Whether you're after the classic synth-bass lines of the '70s or modern soaring leads, this pedal delivers with precision.

Its intuitive design boasts separate Dry and Synth Volume controls, allowing you to fine-tune the perfect mix of your original guitar tone and the synthesized sound. The Sensitivity knob offers dynamic response adjustments, ensuring the synth effect triggers perfectly with your playing style. Plus, the Control knob lets you tailor key parameters for each synth type, while an expression pedal input (sold separately) provides real-time modulation control.

Creating and recalling your favorite sounds is a breeze with the Mono Synth's user-friendly preset system. Save up to 11 customized settings and switch between them instantly during performances. Ideal for guitarists who crave versatility and depth, the Mono Synth is a must-have tool for both studio and stage.

Key Features:

  • 11 unique vintage-flavored synth sounds
  • No need for instrument modifications or MIDI
  • Sensitivity knob for dynamic response control
  • Control knob for customizable synth parameters
  • Separate Dry and Synth Volume controls
  • Expression pedal input for real-time parameter modulation
  • Save and recall up to 11 user presets
  • Includes power supply

Product specs

Pedal Type Guitar Mono Synth
Analog/Digital Digital
Effects 11 x Mono Synths
Inputs 1 x 1/4"
Outputs 1 x 1/4" (effect), 1 x 1/4" (dry out)
Other I/O 1 x 1/4" (expression)
Bypass Switching Buffered
Power Source 9V DC power supply required (included)
Power Usage 125mA
Height 2.25"
Width 4.0"
Depth 4.75"
Weight 0.7 lbs.

FAQs

What types of sounds can the Electro-Harmonix Guitar Mono Synth produce?

The Electro-Harmonix Guitar Mono Synth offers 11 different mono synth sounds, ranging from vintage synth emulations to rich, layered voices and soaring lead tones, all designed for guitar use without needing special pickups or MIDI.

Does the Electro-Harmonix Guitar Mono Synth require any special guitar modifications?

No, the Electro-Harmonix Guitar Mono Synth is designed to work with standard electric guitars without needing any modifications, special pickups, or MIDI implementation.

Can I use an expression pedal with the Electro-Harmonix Guitar Mono Synth?

Yes, the Electro-Harmonix Guitar Mono Synth has an expression pedal input, allowing you to control various parameters of the synth sounds in real-time.

What power supply does the Electro-Harmonix Guitar Mono Synth require?

The Electro-Harmonix Guitar Mono Synth requires a 9V DC power supply, which is included with the pedal.

Is the Electro-Harmonix Guitar Mono Synth suitable for live performances?

Yes, the Electro-Harmonix Guitar Mono Synth is suitable for live performances, offering a range of synth sounds and real-time control options, making it versatile for various musical settings.

EHX

EHX

Electro-Harmonix Mono Synth Guitar Synthesizer Pedal

Video thumbnail for Electro-Harmonix Mono Synth Guitar Synthesizer Pedal by EHX

Electro-Harmonix Mono Synth Guitar Synthesizer Pedal

EHX

EHX

Video thumbnail for Electro Harmonix Mono Synth - Sound Demo (no talking) by Guitar Bonedo

Electro Harmonix Mono Synth - Sound Demo (no talking)

Guitar Bonedo

Guitar Bonedo

Video thumbnail for Electro-Harmonix MONO SYNTH : Guitar Synthesizer of Coney Island Arcade Love by gearmanndude

Electro-Harmonix MONO SYNTH : Guitar Synthesizer of Coney Island Arcade Love

gearmanndude

gearmanndude

Video thumbnail for Electro-Harmonix Mono Synth DEMO by PEDALOGUE

Electro-Harmonix Mono Synth DEMO

PEDALOGUE

PEDALOGUE

Video thumbnail for Electro Harmonix Mono Synth Synthesizer Pedal Demo and Review by The Gear Cage

Electro Harmonix Mono Synth Synthesizer Pedal Demo and Review

The Gear Cage

The Gear Cage

Video thumbnail for Electro-Harmonix Mono Synth (Test Run) by jinjxmusic

Electro-Harmonix Mono Synth (Test Run)

jinjxmusic

jinjxmusic

Reviews

PROS

  • Fun and engaging to use, perfect for 80s sound enthusiasts

  • Diverse range of synth sounds with simple controls

  • Easy to use right out of the box, no steep learning curve

  • Capable of creating interesting sound textures when combined with other effects

  • Seamless integration with other pedals in an effects chain

  • Dedicated knob to improve tracking performance

  • Classic synth tones available at the tap of a button

  • Great sound quality with plenty of adjustment capabilities

  • Unconventional, glitchy sounds add unique character

CONS

  • Features hidden behind an expression pedal lack convenient access

  • Tracking can be inconsistent, requiring attention to playing technique

  • Synth sounds can fall into an uncanny valley between synth and guitar

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Electro-Harmonix Guitar Mono Synth.

Features and functionality

  • The pedal excels at producing lead tones and mono-bass line sounds, but struggles with polyphonic inputs and complex signals with overtones.

    Source
  • The Synth9 has touchy parameter controls, requiring precise adjustments for optimal performance.

    Source
  • The Guitar Mono Synth struggles to trigger effects with bass, as deeper notes don't pick up well, requiring clean, single-note play for best results.

    Source

Use cases and applications

  • Particularly effective for achieving tones reminiscent of "Tainted Love" and other synth sounds from that era.

    Source
  • Running synth pedals through ambient reverb, chorus, and delay can significantly enhance their sound, reducing perceived cheesiness.

    Source
  • The Bass Mono Synth works well with a bass when paired with a Bass Big Muff, providing a fun and engaging experience.

    Source

Comparisons

  • Considered limited compared to the Boss SY-1, which offers more versatility and polyphonic capabilities.

    Source
  • The Electro-Harmonix Synth9 is polyphonic, but struggles with fast playing or bends, leading to glitches.

    Source
  • The Meris Enzo is recommended for its superior 80s synth capabilities, though it's pricier than the Electro-Harmonix options.

    Source
  • A YouTube video shows the Bass Mono Synth functioning with a guitar, especially when using a dual amp setup for mixed sounds.

    Source

User experience

  • Users find it enjoyable for creating loops, though some modes may sound too cheesy for certain tastes.

    Source
  • The Synth9 may exhibit latency and tracking issues, which can affect the overall playing experience.

    Source
  • Playing hard can trigger effects on the Guitar Mono Synth with a bass, but the output may sound harsh or distorted.

    Source

Value and pricing

  • Often found at a lower price point, making it an attractive option for budget-conscious buyers who can easily resell if unsatisfied.

    Source

Critic Reviews

Review: Electro-Harmonix Mono Synth

guitar.com

The Electro-Harmonix Guitar Mono Synth offers intriguing sonic possibilities with its 11 synth voices, making it a playground for adventurous guitarists. However, the monophonic nature limits its use, demanding single-note precision to avoid glitches. While features like preset storage and expression pedal connectivity enhance its appeal, some voices like Tinker, Lair, and Ghost miss the mark in emulating classic synth sounds. At £115, it’s a tempting choice for those willing to embrace its quirks, but an expression pedal is essential to unlock its full potential. A fun tool for the experimental, but not without its limitations.

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