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Electro-Harmonix MicroSynth XO Guitar Effects Pedal

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150616 000000000
Product Price $286.0
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The Electro-Harmonix MicroSynth XO is a guitar pedal that creates fat analog synth sounds like those heard on classic recordings by some of the fines...Click To Read More About This Product

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Don't Forget

Dial in that classic analog synth sound with the Microsynth.

The Electro-Harmonix MicroSynth XO is a guitar pedal that creates fat analog synth sounds like those heard on classic recordings by some of the finest musicians in the world. From the classic vintage sounds of the great early Moog synthesizer to custom creations, the MicroSynth effects pedal delivers. Its compact 10-slider layout lets the sonically adventurous guitarist dial in a virtually limitless array of analog synthesizer sounds, from percussive stabs to backward-sounding bowed effects.

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

Get that fat sound you've been looking for—order now.


Review Snapshot

by PowerReviews
Electro-HarmonixMicroSynth XO Guitar Effects Pedal

(based on 3 reviews)

Ratings Distribution

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  • 1 Stars



Reviewed by 3 customers

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(18 of 18 customers found this review helpful)


With a little patience, you won't be disappointed.

By Jacob Cooper

from The Dark Side of The Moon

See all my reviews

Comments about Electro-Harmonix MicroSynth XO Guitar Effects Pedal:

A couple of important things to know before you buy this pedal:

First: Use the power supply that comes with it!!! I initially put mine on my Boss BCB60 pedal board and used the daisy chain power supply. Not sure if it was this or user error that resulted in my initial failure to get a good sound out of the pedal... but I think both played a role. If you read the instruction manual, it says the same thing. Using a daisy chain can ruin the pedal. This pedal needs all the juice it can get to work right... so use the adapter.

Second: Give it time. This is definitely not a plug and play pedal. The first day, I couldn't get anything good out of it. By the third day, I was making sounds I never thought a guitar could make.

Third: This pedal is great alone, but it really benefits from having a delay and a compressor. Some of the settings on it are not friendly to sustained notes. I use the pedal along with my EHX Little Big Muff to help the Muff cut through during solos (think Siamese Dream era Smashing Pumpkins). Occasionally when sustaining a note, the pedal will cut the note off before you release the note (even worse when sharing a power source with other pedals). You can overcome this by adjusting your playing, but delay, compression, or a signal boost (distortion, overdrive or cranked volume) really help with that issue, as well as enhancing the beautiful sounds you can get out of this box.

Lastly: This pedal is by no means subtle. It is a beast! It's probably not for those seeking a mild and friendly tone. This pedal is for those looking to explore sonic territories in which few guitar players dare to travel...

P.S. It doesn't handle chords well, but it can do arpeggios fine.
This pedal has so many features it can be a bit overwhelming at first. The first night I had it, I almost returned it. I did some reading and played around with the suggested settings and that changed very quickly.

One of my bandmates has a very nice Korg Synthesizer, and I was able to mimic his tones with my guitar fairly easily.

I was also able to spice up my lead tones and get amazing octave effects, and some really beautiful feedback.
As with 99% of EHX's products, it's built like a tank and can take many years of liberal stomping.
It is a pricey pedal, but it's like 5+ pedals in one. Given you'd easily pay $80+ for a pedal that does one thing, this box is a steal.

(15 of 15 customers found this review helpful)


Fantastic pedal IF you want it to be

By Pink-c4HLn

from The clouds

Comments about Electro-Harmonix MicroSynth XO Guitar Effects Pedal:

Its relative goodness will vary greatly depending on what the user is looking for, and what they are able to achieve.In general you get pure analog, chewy, velcro-y, octave-y, distorted goodness. Its just so freaking cool. Put a phaser or delay after it (or a PS-5) in front of it and good god you can get some amazing sounds. I just got the most bitching laser blaster sound from it today- too cool. But what's that you say? When am I ever actually going to USE this pedal? I dunno. If you are in a Rolling Stones cover band, then never. If you write original stuff then you would still be wise to limit this baby to one or two songs per set. There is a reason that no famous guitarist uses the MS as their backbone like Tom and the Whammy, Edge and the MM, etc. You will have to find that out on your own.Also, there is a VERY harsh and abrupt gate on this pedal that will cut your notes off fast. As such don't expect to use just the "square wave" in place of a fuzzbox, unless you don't need any notes to sustain. This pedal is not made for epic solos, it's made for making you guitar sound like a keyboard or chainsaw or laser rifle.

(1 of 1 customers found this review helpful)


Spendy but killer

By Jay

from Las Vegas, NV

About Me Experienced

See all my reviews

Verified Buyer


  • Compact Design
  • Excellent Sound Quality
  • Good Selection Of Effects
  • Responsive
  • Versatile


    Best Uses

    • Amateur Recording
    • Home Studio
    • Performances
    • Professional Recording

    Comments about Electro-Harmonix MicroSynth XO Guitar Effects Pedal:

    Haven't quite figured it out yet, takes a little gettin' used to. The sounds you get are pretty epic though. The sweep can be fast or slow (controlled by the rate level). The octaves are legit, the square wave adds the extra distortion. I haven't figured out the ring modulator yet but just check the youtube vids for more on functionality. Pretty spendy but if you're lookin' for some crazy sounds, get it.

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