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Electro-Harmonix Bass Mono Synth

^# 70

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$96.69 to $151.50 Price Tier: Standard

4.5 (9)

2 Critic Reviews

2 Reviews

Find out who is using Electro-Harmonix Bass Mono Synth

9 community setups

11 wishlisted

66 saved

Page last updated Jul 01, 2026

Pricing and availability

We compare 600+ stores and found this item at 10 stores. Prices updated July 1, 2026.

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3.5 (27)

$151.50

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3.0 (11)

$151.50

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3.7 (136)

$151.50

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4.0 (36)

$96.69 57 available New

$66.13 23 available Used

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4.0 (1)

$151.50

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4.0 (4)

$151.50

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$151.50

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4.1 (79)

$115.00

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£134.50

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$151.50

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Average Price: $134

Standard/Professional

$70

$201+

Price Tier

In the Bass Effects Pedals category, Electro-Harmonix Bass Mono Synth is priced in the Standard/Professional range. This is quality gear at a fair price point, suitable for beginners, hobbyists, and pros alike.

Budget

Standard

High-end

Price History

Based on price data from 7 merchants for "Electro-Harmonix Bass Mono Synth". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Unleash the power of your bass with the Electro-Harmonix Bass Mono Synth, an innovative pedal designed to amplify your creativity and redefine your sound. This monophonic synth pedal puts 11 distinctive synthesizers at your disposal, offering everything from vintage synth emulations to thick, stacked voices and deep pulsing sounds. Whether you're after warm, lush tones or sharp, percussive stabs, this versatile pedal has got you covered.

The Electro-Harmonix Bass Mono Synth excels in its simplicity, with an intuitive layout that makes it easy to dial in sounds quickly. The DRY and SYNTH controls let you create the perfect mix of your dry bass signal and the synthesizer sound, while the SENS control adjusts how your playing dynamics trigger the synthesizer, allowing you to fine-tune the pedal's response to your rig and playing style.

One notable feature is the CTRL knob, which adjusts a key parameter for each of the 11 synth types. This gives you an extra level of tweakability, helping you to customize your sound even further. The pedal also includes an EXP input, allowing you to control an entirely different parameter in real-time with an expression pedal.

The built-in Preset footswitch is a handy addition, enabling you to create, save, and recall a user-customizable preset for each of the 11 synth sounds. The factory presets are easily restored should you wish to return to the original settings.

Key Features:

11 unique synth sounds
DRY and SYNTH controls for balanced output
SENS control for adjusting the synthesizer's response to playing dynamics
CTRL knob for adjusting a key parameter for each synth type
EXP input for real-time parameter control with an expression pedal
Built-in Preset footswitch for creating, saving, and recalling presets
User-friendly layout for easy operation
Comes equipped with an EHX 9.6DC-200mA power supply
True Bypass for maintaining signal integrity when the pedal is not engaged

Owner's manual

Electro-Harmonix Bass Mono Synth User Manual

Product specs

Pedal Type	Bass Guitar Mono Synth
Analog/Digital	Digital
Effects	11 x Mono Synths
Inputs	1 x 1/4"
Outputs	1 x 1/4" (effect out), 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"
Width	2.63"
Depth	4.4"
Weight	0.27 lbs.

FAQs

What types of sounds can the Electro-Harmonix Bass Mono Synth produce?: The Electro-Harmonix Bass Mono Synth features 11 different synth sounds, allowing you to create a wide range of bass tones from classic analog synths to modern digital textures.
Is the Electro-Harmonix Bass Mono Synth pedal suitable for live performances?: Yes, the Electro-Harmonix Bass Mono Synth is well-suited for live performances, offering buffered bypass switching for seamless transitions and an expression pedal input for real-time control over parameters.
Can the Electro-Harmonix Bass Mono Synth be used with a guitar?: While designed for bass, the Electro-Harmonix Bass Mono Synth can be used with a guitar; however, the tracking and sound may vary since it's optimized for bass frequencies.
What power supply does the Electro-Harmonix Bass Mono Synth require?: The Electro-Harmonix Bass Mono Synth requires a 9V DC power supply, which is included with the pedal.
Does the Electro-Harmonix Bass Mono Synth have a dry output option?: Yes, the Electro-Harmonix Bass Mono Synth includes a dry output, allowing you to blend your unprocessed bass signal with the synth effects.

Videos

Add video

EHX

Electro-Harmonix Bass Mono Synth Bass Synthesizer Pedal

EHX

Electro Harmonix Bass Mono Synth Demo

The Bass Channel

Electro-Harmonix Bass Mono Synth Demo [2 Minute Demo]

My Bassist Chris

Electro-Harmonix Bass Mono Synth - What Does it Sound Like?

Deadbeat Studios

Electro-Harmonix - Bass Mono Synth

Bass Stuff

Electro Harmonix Bass Mono Synth Demo

Luca García Ferrari

Turn Your Bass Into A Synth | Bass Mono Synth | Electro-Harmonix

Dave Murray

Reviews

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PROS

Produces cool, usable sounds, especially for covering specific tunes
Includes a variety of modulation options and presets
Offers an expression option for added control
User-friendly layout; easy to operate
Good build quality and durability at unboxing
Tracks well down to low B, suitable for bass
Fun and encourages experimentation on the fretboard
Affordable for the range of synth sounds provided

CONS

Limited to monophonic input; cannot handle chords well
Some presets exhibit glitching, affecting live/studio use
Latency issues, especially with fast playing
Poor sound quality when played loudly or through a PA
Requires careful adjustment of sensitivity for optimal use
Not all preset sounds deemed usable by some users
Tracking can be hit or miss, affecting quick passages
Design may produce high-pitched chirps with accidental noise

Owner Insights

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

Features and functionality

0 0

The tracking is reportedly poor, especially with fast passages or chords, but it's decent for slow, single notes.
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The pedal is highly responsive to bright signals with overtones but can be managed using the tone knob to prevent it from "freaking out."
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Considered highly plug-and-play, making it accessible for beginners in synth pedals.
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Perfect for certain songs despite tracking flaws, remains on pedalboards for its ease of use and fun factor.
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Comparisons

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The Boss SY-1 and Source Audio C4 are frequently mentioned as alternatives with better tracking, though they are more expensive.
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Many users find more versatility in the Zoom MS series, which has a wide range of synth patches and effects, despite its challenging layout.
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While the Digitech Dirty Robot offers versatility, the Microsynth is praised for sound quality, despite tracking finickiness.
Source

Use cases and applications

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The pedal is praised for its ability to generate interesting sounds when sliders are adjusted on long-held notes or chords.
Source
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Particularly effective for replicating the "Tainted Love" tone and generating mono-bass line sounds.
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Effective for creating artificial bass sounds in pop covers, as noted by users who gig regularly.
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User experience

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Some owners find the Data Corrupter offers better tracking and unique sounds compared to the Bass Mono Synth.
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Considered fun for creating loops and experimenting with sound, though some modes may sound overly cheesy to some users' tastes.
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Some owners notice latency issues, but this sensitivity varies; not everyone perceives delay.
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Value and pricing

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Often found cheaply, such as Amazon returns in good condition, making it an accessible entry point for experimentation.
Source

Critic Reviews

Electro-Harmonix Bass Mono Synth Review - Premier Guitar

premierguitar.com

The Electro-Harmonix Bass Mono Synth delivers a delightful array of warm, analog tones that can invigorate your bass playing. With 11 impressive presets, it offers great programmability and expression pedal compatibility. However, it may be finicky with tracking and requires clean playing for optimal performance. The controls are user-friendly, and the sound quality is engaging, particularly for genres leaning towards EDM. While it won't perfectly replicate a keyboard synth, it provides a satisfying taste of classic synth sounds for bassists. Overall, a solid choice for those looking to explore synth effects on their bass.

positive

Full Review

Electro Harmonix Bass Mono Synth review | MusicRadar

musicradar.com

Highly regarded for its impressive sound quality and fast tracking, the Electro-Harmonix Bass Mono Synth is a fantastic choice for bassists looking to explore synth sounds without the usual headaches. With 11 synth types and an intuitive design, it's both versatile and user-friendly. However, it's important to remember that this monophonic pedal can only handle one note at a time, which might limit its appeal for those seeking complex chordal textures. Still, at its price point, this pedal is a steal for anyone wanting to enhance their sonic palette.

positive

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4.5 out of 5

Based on 2 Reviews and 9 Ratings

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1 star

chatho

112

over 5 years ago

A great bit of kit, once you understand it

When I first got the EHX bass mono synth, I found it very hard to dial in any synth sounds that would track well with my bass, to the point where I was going to send it back. However, after playing around with it once more, I figured out how to get amazing synth sounds on each of the 11 settings. I found the trick was to have a low sensitivity setting and a low synth volume. Doing this meant that the tracking of the pedal was highly accurate and there would no longer be any distortion or glitching sounds. The pedal is mono, meaning that playing does have to be somewhat precise and only single notes should be played to prevent a very unpleasant sound accidentally being produced.

I would still highly recommend this pedal to anyone looking for killer synth tones, I would just suggest spending a lot of time playing around with the settings if you ever consider returning it.

Roles:

Guitarist Bassist

Genres:

Rock Alternative rock Indie rock