Electro-Harmonix Micro Q-Tron main image

Electro-Harmonix Micro Q-Tron

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$77.00 to $112.50 Price Tier: Standard

4.0 (52)

1 Critic Review

5 Reviews

Find out who is using Electro-Harmonix Micro Q-Tron

4 community setups

21 wishlisted

136 saved

Page last updated Jun 24, 2026

Pricing and availability

We compare 600+ stores and found this item at 9 stores. Prices updated June 23, 2026.

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Reviews

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4.5 (7)

$112.50

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4.5 (9)

$112.50

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4.4 (141)

$112.50

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5.0 (66)

$89.40 54 available New

$62.61 31 available Used

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4.0 (21)

$112.50

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$112.50

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$112.50

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4.2 (138)

$87.00 $77.00 $10.00 · All time low

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£95.00

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Average Price: $100

Standard/Professional

$70

$251+

Price Tier

In the Filter Effects Pedals category, Electro-Harmonix Micro Q-Tron 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 Micro Q-Tron". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Introducing the Electro-Harmonix Micro Q-Tron, a compact, envelope follower effects pedal that serves as a unique sound modifier. Its dynamic design allows the user's playing style to control the effect, with the volume of the input signal dictating the cutoff frequency of the filter. As the volume increases or decreases, so does the pitch of the filter.

The Micro Q-Tron's effect is regulated by your playing dynamics—a stronger attack produces a more dramatic effect, while softer playing yields more subtle effects. Use the full range of control settings in combination with different playing techniques to unlock a myriad of unique effects.

Coupled with a rugged, road-ready die-cast chassis, this pedal is compact enough to fit on even the most crowded of pedalboards. The Micro Q-Tron is powered by either a 9V battery or an optional Electro-Harmonix US96DC-200BI 9VDC guitar effects power supply (sold separately).

Key Features:

Unique envelope follower effects pedal that lets your playing style control the sound
Drive control sets the sensitivity and filter sweep range
Q control determines the frequency peak of the filter
Mode switch (LP, BP, HP) determines the frequency range the filter will pass through
Footswitch engages and disengages the effect
Can be powered by a 9V battery or an optional Electro-Harmonix US96DC-200BI 9VDC guitar effects power supply
Compact, road-ready die-cast chassis suitable for crowded pedalboards
True-bypass switching doesn't color your tone when the pedal isn't in use
Good bass reproduction and stable switch
High input impedance buffered bypass
15 dB Midrange cut and boost control for the perfect midrange scoop
Output volume and master drive controls
Panel-selectable hi and low Top Boost control
Connections: Connect your instrument to the Input jack and your amplifier to the Output jack.

Owner's manual

Electro-Harmonix Micro Q-Tron User Manual

Product specs

Pedal Type	Envelope Filter
Analog/Digital	Analog
Inputs	1 x 1/4" (instrument)
Outputs	1 x 1/4"
Switches	Filter Mode (lowpass, bandpass, highpass)
Controls	Drive
Adjustable Q	Yes
True Bypass	Yes
Power Source	9.6V DC-200mA power supply (sold separately)
Power Usage	15mA
Batteries	1 x 9V (included)
Height	2.25"
Width	4"
Depth	4.75"

FAQs

What types of sounds can I create with the Electro-Harmonix Micro Q-Tron?: The Electro-Harmonix Micro Q-Tron is an envelope filter pedal that allows you to create dynamic filter effects, including lowpass, bandpass, and highpass sounds. It reacts to your playing dynamics, producing a range of funky, auto-wah style tones.
Does the Electro-Harmonix Micro Q-Tron have true bypass?: Yes, the Electro-Harmonix Micro Q-Tron features true bypass, ensuring that your guitar's tone remains uncolored when the pedal is not engaged.
What power supply does the Electro-Harmonix Micro Q-Tron require?: The Electro-Harmonix Micro Q-Tron requires a 9.6V DC-200mA power supply, which is sold separately. It can also be powered by a 9V battery, which is included.
Can the Electro-Harmonix Micro Q-Tron be used with bass guitar?: Yes, the Electro-Harmonix Micro Q-Tron can be used with a bass guitar, providing a wide range of expressive filter effects suitable for bass frequencies.
How does the filter mode switch on the Electro-Harmonix Micro Q-Tron work?: The filter mode switch on the Electro-Harmonix Micro Q-Tron allows you to select between lowpass, bandpass, and highpass filter modes, giving you versatility in shaping your sound.
Is the Electro-Harmonix Micro Q-Tron suitable for live performances?: Yes, the Electro-Harmonix Micro Q-Tron is suitable for live performances, offering dynamic envelope filter effects with quick response to your playing, enhanced by its compact and durable design.

Videos

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ProGuitarShopDemos

Electro Harmonix Micro Q-Tron Envelope Filter

ProGuitarShopDemos

Electro-Harmonix Micro Q-Tron Demo

Ryan Robinson Guitarist

Electro-Harmonix Micro Q-Tron Bass Demo

The Bass Channel

Electro-Harmonix Micro Q-Tron Envelope Filter Pedal (Demo by Larry DeMarco)

EHX

Electro Harmonix Micro Q-Tron Envelope Filter | Gear4music demo

Gear4music Guitars

MusicMaker Presents - EHX MICRO Q-TRON: Taking Auto-Wah's Into Another Dimension

Musicmaker

Electro Harmonix Micro Q-Tron Demo

Chuck's Guitar Geekery

Test EHX Micro Q-Tron

TooNyTooN

Reviews

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PROS

Small footprint, easy to fit on pedalboards
Authentic Jerry Garcia-esque tones achievable
Versatile, works with both single coils and humbuckers
Compatible with other pedals for layered effects
Sturdy metal build quality
Can simulate the original Mu-Tron sound closely
Inspires creativity and extended play sessions
Effective for funk, reggae, and similar genres
Good pedal for bass, especially in funky settings

CONS

Some units may have quality control issues
Requires a lot of gain to function properly
Limited range of sounds compared to competitors
Learning curve to dial in desired effects
Significant volume boost when engaged, affecting balance
Not as robust in sound variety as original Mu-Tron
High-pass mode less useful for bass players

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Electro-Harmonix Micro Q-Tron.

Features and functionality

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Volume spikes are a common issue due to the resonance of the filter, and the Micro Q-Tron lacks level controls to manage this effectively.
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Using a compressor pedal after the Micro Q-Tron can help control the volume spike.
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The Micro Q-Tron performs optimally with the guitar's volume set to maximum, as the input signal's strength significantly affects filter response.
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Comparisons

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The MXR Bass Envelope Filter offers wet and dry knobs, which help maintain normal bass tones, unlike the Micro Q-Tron.
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The Aguilar Filter Twin is noted for being more level-matched and offers a blend between two filters, unlike the Q-Tron.
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Using a compressor before or after the Micro Q-Tron can significantly help manage the dynamic response, similar to how overdrive pedals are used with vintage fuzz effects.
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User experience

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Some owners address the volume spike by running the Micro Q-Tron through a secondary amp to balance the sound.
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One owner has used a secondhand unit for over four years without reliability issues, emphasizing the durability of used models.
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Build quality

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Users have reported inconsistent quality control in early 2000s models, with some units having sensitivity issues.
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Mods and upgrades

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Users suggest considering an upgrade to a Micro-Tron IV for better performance and fewer volume issues.
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A master volume mod is recommended by some users to better manage the volume boost issue.
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Value and pricing

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Purchasing from a retailer with strong customer service is advised to leverage warranty support in case of early issues.
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Setup and maintenance

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Opening the pedal and adjusting an internal component clockwise can increase effect sensitivity, offering improved performance for some users.
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Use cases and applications

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Adding a low-gain overdrive pedal before and a compressor after the Micro Q-Tron enhances its responsiveness and dynamic range.
Source

Critic Reviews

Electro Harmonix Micro Q-Tron review – Guitar Design Reviews

guitardesignreviews.com

The Electro-Harmonix Micro Q-Tron fails to inspire the reviewer, who laments its lackluster sound and complexity compared to simpler alternatives. While it's sturdy and offers multiple sound-shaping options, the pedal's outputs are described as uninspiring, failing to ignite creativity or excitement. The confusion over its manufacturing origin adds to the disappointment. Despite its potential for funky styles, it ultimately doesn't deliver the compelling sound the reviewer sought, making it a pass for those seeking instant musical inspiration.

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Full Review

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4.0 out of 5

Based on 5 Reviews and 52 Ratings

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jeremy_crockett

7006

almost 2 years ago

Essential for Funk, Jerry Garcia's Tone, and 70s Groove.

I had been considering buying one of these for quite a while now. I finally went ahead and pulled the trigger.

You KNOW the sound you want and THIS is the way to get THAT effect. If you are on the fence, go ahead and buy the thing. It's worth it.

I understand that "It's not a Mu-Tron" but to my ears, I cannot tell the difference, especially for the cost.

It will work with guitar and bass, so I'm covered.

Roles:

Bassist

Genres:

Rock Blues Jazz

From Gear Setup

sonounexcapellone

326

over 6 years ago

Fun pedal but the volume increase is a big cons

I was looking for an auto-wah to use primarily with a clean sound, for "funky purposes". I tried this and a maxon af-9 and decided to buy the maxon at first, because it seemed definitely more versatile (maybe also because the guy from the shop talked me into buying it saying it was unquestionably better...) I spent an afternoon trying to get something i'd really dig out of it, unsuccessfully, so the next day I went back to the shop, gave the maxon back and got home with the ehx. I can say that for my purposes it was a good choice. You need to spend some time tweaking the knobs to really get what you want out of it (also depending on the pickups you are using of course) but this pedal is rather easy and fun to use. I play with a SG and a tele, and I ended up using it not only with clean sounds but also combined with overdrives. IMO the only problem about it is the HUGE amount of output volume you get anytime you engage it, regardless of your pickups, amp etc. So I wouldn't recommend to buy it if you're going to use it live on few songs, and if your pedalboard was patiently and carefully balanced and you don't want to fuck that up.

From Gear Setup

pablo_prieto

186

over 3 years ago

It's a great pedal

The only bad thing about this pedal is that when you use it, the gain volume increases a lot, which is a bit uncomfortable.

This review has been translated automatically into English. See original

Roles:

Bassist Music Producer

Genres:

Rock Pop Funk / Soul

ongy13

152

over 11 years ago

A nice funky filther

I don't use this effect a lot, but for my needs, it suits very well. My only complain is the huge volume increase when you engage the effect on certain setups.

From Gear Setup