Pricing and availability

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Sweetwater
4.5 (2)
$324.80
Reverb
5.0 (6)
$399.00 8 available Used
zZounds
4.0 (5)
$324.80
Gear4Music
£288.00

Average Price: $324

Standard/Professional

$150

$601+

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Based on price data from 2 merchants for "Electro-Harmonix EH-7900 Micro Synthesizer". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Introduce the Electro-Harmonix EH-7900 Micro Synthesizer, an instrument that bridges the gap between vintage and modern soundscapes. This guitar synthesizer pedal takes your sound beyond traditional boundaries, unlocking a universe of tonal possibilities. From the timeless resonance of early Moog synthesizers to audacious, custom-made soundscapes, the EH-7900 is your ticket to unexplored sonic realms.

Featuring ten slider controls, the EH-7900 offers unparalleled versatility, allowing you to shape and mold your tone with precision. Highlighting its four independent and fully mixable voices - Guitar, Octave, Sub-Octave, and Square Wave, this micro synthesizer provides the means to craft unique, otherworldly sounds.

With its envelope control, you can modify these signals to create a variety of "bowed" or "blown" sounds. Whether you're chasing the nostalgic tones of the past or breaking new ground with innovative sounds, the EH-7900 Micro Synthesizer is your trusted companion on this sonic journey.

Key Features:

  • XO Series chassis
  • True bypass
  • All analog design
  • 2-pole analog resonant filter
  • 4 voice mixer section mixes: sub octave, original, octave up and square wave
  • Square wave voice can be used as a distortion tone
  • Start, stop filter frequency sliders with adjustable rate for full control over the filter's sweep direction and speed
  • Adjustable filter resonance control
  • Adjustable attack time control for fading-in notes
  • Tough and compact die-cast chassis
  • 96DC-200BI power supply included

Product specs

Pedal Type Guitar Synth
Inputs 1 x 1/4"
Outputs 1 x 1/4"
Power Source 9V DC power supply (included)
Height 3.5"
Width 8"
Depth 7"
Weight 2 lbs.

FAQs

What kind of sounds can I create with the Electro-Harmonix Micro Synthesizer?

The Electro-Harmonix Micro Synthesizer allows you to create a wide range of synth-like sounds, including classic analog synth tones, octave effects, and sweeping filter sounds, ideal for both experimental and traditional music.

Is the Electro-Harmonix Micro Synthesizer suitable for bass guitar?

Yes, the Electro-Harmonix Micro Synthesizer works well with bass guitars, offering robust low-end synth sounds that enhance your bass lines with unique textures.

What power supply does the Electro-Harmonix Micro Synthesizer require?

The Electro-Harmonix Micro Synthesizer requires a 9V DC power supply, which is included with the pedal.

Can the Electro-Harmonix Micro Synthesizer be used in a live performance setup?

Absolutely, the Electro-Harmonix Micro Synthesizer is designed for live use, providing musicians with versatile sound options and reliable performance on stage.

How does the Electro-Harmonix Micro Synthesizer differ from other guitar synth pedals?

The Electro-Harmonix Micro Synthesizer stands out with its classic analog design, offering a unique combination of envelope shaping, sub-octave, and filter sweep controls for a broad sonic palette.

EHX

EHX

Electro-Harmonix Micro Synthesizer Analog Guitar Microsynth Pedal (Demo by Peter Stroud)

Video thumbnail for Electro-Harmonix Micro Synthesizer Analog Guitar Microsynth Pedal (Demo by Peter Stroud) by EHX

Electro-Harmonix Micro Synthesizer Analog Guitar Microsynth Pedal (Demo by Peter Stroud)

EHX

EHX

Video thumbnail for PedalsAndEffects: 1970's era Electro Harmonix Micro Synthesizer by Pedals and Effects

PedalsAndEffects: 1970's era Electro Harmonix Micro Synthesizer

Pedals and Effects

Pedals and Effects

Video thumbnail for Electro Harmonix Micro Synthesizer by shnobel

Electro Harmonix Micro Synthesizer

shnobel

shnobel

Video thumbnail for Vintage 1979 Electro-Harmonix Micro Synthesizer by GMR spares

Vintage 1979 Electro-Harmonix Micro Synthesizer

GMR spares

GMR spares

Video thumbnail for EHX Micro Synthesizer Violin Demo by Rob Flax

EHX Micro Synthesizer Violin Demo

Rob Flax

Rob Flax

Video thumbnail for 1979 Electro Harmonix Micro Synthesizer V1 ∆ ultra rare first version by aplusfx

1979 Electro Harmonix Micro Synthesizer V1 ∆ ultra rare first version

aplusfx

aplusfx

Reviews

PROS

  • Versatile pedal with touch-sensitive response

  • User-friendly layout blends classic and unique synth tones

  • Converts electric guitar into a bass effectively

  • Square wave distortion cuts fiercely atop overdriven amps

  • Offers classic synth-y, robotic sounds reminiscent of iconic bands

  • Fuzz feature competes with top fuzz pedals in the market

  • Voice Mix section allows for custom blend of fuzz and octave sounds

  • Encourages exploration with various settings for creative sound creation

  • Rewards players with clean picking technique and patience

CONS

  • Tracking issues with sustained notes and complex chords

  • High sensitivity to playing dynamics and settings requires precision

  • Not ideally suited for typical rock guitar setups

  • Lacks presets for easy sound switching

  • Large size and 24V power requirement in older models

  • Fuzz does not clean up, limiting versatility

5.0 out of 5

Based on 1 Review and 16 Ratings

5 star
4 star
3 star
2 star
1 star
rothhandlestudios

Great guitar filter.

I have used this a fair bit lately. Has almost a Robert Fripp quality to it.

Genres:
From Gear Setup

Artist usage

Add artist
See how Andrew Osenga uses Electro-Harmonix EH-7900 Micro Synthesizer

Andrew Osenga

Singer

Caedmon's Call

...
Verified via Andrewosenga

" My old Electro-Harmonix Micro-Synth, which is one of the weirdest, most bizarre (and most loved) pedals I've ever owned, will then leave the basement and go where the Space Station is right now." - Osenga about the MicroSynth pedal.

See how Helios Creed uses Electro-Harmonix EH-7900 Micro Synthesizer

Helios Creed

Guitarist

Chrome

...
Verified via Helioschrome

His trademark fuzz-wah freakouts and echo washes are produced with the help of a ProCo Rat, an original Vox CryBaby, and an Electro-Harmonix Micro-Synth and Deluxe Memory Man.

See how Timothy J. Fairplay uses Electro-Harmonix EH-7900 Micro Synthesizer

Timothy J. Fairplay

Music Producer

...
Verified via YouTube

Shown at 0:29 in the FACT "In The Studio" video.

See how Giulio Favero uses Electro-Harmonix EH-7900 Micro Synthesizer

Giulio Favero

Bassist, Music Producer

One Dimensional Man

...
Verified via Photo

In an Instagram post by lorenzomariotti_occhialaio, it is shown that Giulio Favero uses the Electro-Harmonix EH-7900 Micro Synthesizer pedal during the reunion tour of the band "Il Teatro Degli Orrori." The caption reads, "Cazzarola, niente male! Pedaliere per il nuovo tour de @il_teatro_degli_orrori assemblate con amore per @gionatamirai e @giulioragnofavero," confirming the gear's use.

T

Tom Lodewyckx

Guitarist

K's Choice

...
Verified via YouTube

In a video by Ed Struijlaart titled "Rig Rundown: Tom Lodewyckx’s Gear Setup met Clouseau in het Sportpaleis Antwerpen," Tom Lodewyckx explains his pedalboard setup, which includes the Electro-Harmonix EH-7900 Micro Synthesizer.

See how Ali Güçlü Şimşek uses Electro-Harmonix EH-7900 Micro Synthesizer

Ali Güçlü Şimşek

Guitarist, Composer

...
Verified via Photo

Ali Güçlü Şimşek uses the Electro-Harmonix Micro Synth XO, as confirmed in an interview detailing his set-up, which is supported by an accompanying image.

See how Jonathan Noyce uses Electro-Harmonix EH-7900 Micro Synthesizer

Jonathan Noyce

Bassist

Jethro Tull

...
Verified via Photo

On the official Jethro Tull site, Jonathan Noyce states that he uses an Electro Harmonix Micro Synthesizer.

See how Chico Mann uses Electro-Harmonix EH-7900 Micro Synthesizer

Chico Mann

Guitarist, Keyboardist

Antibalas

...
Verified via Ehx

Built into his Caius guitar, as featured in this January 6, 2013 Electro-Harmonix Blog post.

Chico Mann, a prolific afrobeat artist, turned us on to a tune he did using his guitar with its built-in EHX MicroSynth. Here it is:

Click to listen

“I played the Caius guitar with built-in MicroSynth plugged into a chain of all my EHX pedals.

To start, I tuned down my E-string, muted all the strings with a strip of foam so that I got a dull thump. Then I filtered the MicroSynth to get a low frequency tone as my bass drum sound. Ran the guitar through an ‘80s Fender 75 with the bass rolled up, mids a little less than half-way, and treble about one-quarter. Then played and recorded a four-on-the-floor bass drum pattern to a click track.

Next I filtered the MicroSynth to have a higher frequency cutoff for my snare sound, eq’d the amp accordingly, recorded that. Then in the same fashion made a 12-bit-like HH sound and recorded it. Mind you, I played all the ‘drum’ sounds straight through. No looping! The Big Muff Pi came in handy for these sounds too!

With the POG-2, I made some organ sounds and comped some chords. The SuperEgo and Holy Grail gave the comps an extended decay with washy ambience.

Next I made a squelchy, resonant synth bass sound ala the Roland TB-303 with the MicroSynth. The POG-2 added the octaves below for a more convincing synth bass sound.

The top-line synth parts were made the same way, basically with MicroSynth programming and EHX pedals for coloration. The detune function on the PolyChorus is also really handy at helping create the detuned oscillator vibe that I love about analog synths.

I could probably keep going about the particulars but that’s the basic gist of my process.

This was just a little demo that I recorded in a couple of hours to show what EHX pedals could do when you approach them from a little outside the box!”

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Community setups

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sacha_il_bove_show

Gear IQ 937

rothhandlestudios

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Gear IQ 1963

juliengb

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Gear IQ 62

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