MXR M291 Dyna Comp Mini

^# 16

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$109.99 to $131.00 Price Tier: Standard

4.5 (19)

1 Critic Review

4 Reviews

Find out who is using MXR M291 Dyna Comp Mini

5 community setups

14 wishlisted

63 saved

Page last updated Jul 01, 2026

Pricing and availability

We compare 600+ stores and found this item at 7 stores. Prices updated June 30, 2026.

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Reviews

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5.0 (6)

$115.99

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5.0 (4)

$115.99

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4.6 (113)

$115.99 New

$99.99 Used (Like New)

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5.0 (28)

$109.99 87 available New

$58.00 38 available Used

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5.0 (1)

$115.99

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$115.99

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4.8 (18)

$133.00 $131.00 $2.00 · All time low

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Average Price: $110

Standard/Professional

$50

$201+

Price Tier

In the Compressor Effects Pedals category, MXR M291 Dyna Comp Mini 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 5 merchants for "MXR M291 Dyna Comp Mini". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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The MXR M291 Dyna Comp Mini Compressor Pedal is a modern convenience that brings the classic tone into a compact and pedalboard-friendly format. It's a compact reincarnation of the iconic Dyna Comp, offering the legendary 'squash' tone that musicians have loved for decades. The pedal packs the same punch as its larger predecessor but in a size that's nearly half.

What makes this pedal special is the "metal can" CA3080 IC chip, which was found in vintage Dyna Comps. This chip provides a transparent tone, coupled with low noise, enhancing your guitar rig's natural tone without the need for overdrive. The pedal also features an all-new Attack switch, giving you the choice between slow and fast attack times. Whether you want the classic squish and sustain or a more natural attack that lets your picking dynamics shine through, the MXR Dyna Comp Mini has you covered.

Key Features:

Classic MXR compression in a compact, pedalboard-friendly size.
Features the same "metal can" CA3080 IC chip found in vintage Dyna Comps for a transparent tone and low noise.
All-new Attack switch to toggle between slow and fast attack times.
Offers the same legendary 'squash' tone as the original Dyna Comp.
True bypass for preserving signal integrity when not in use.
Standard control layout of Sustain and Output.
LED status indicator.
6.3 mm jack input and output.
Powered by a 9 V DC power supply unit (not included).
Note: Battery operation is not supported.

Product specs

Pedal Type	Compressor
Analog/Digital	Analog
Inputs	1 x 1/4"
Outputs	1 x 1/4"
Bypass Switching	Buffered
Power Source	9V DC power supply required (sold separately)
Power Usage	4mA
Height	1.2"
Width	1.5"
Depth	3.63"
Weight	0.28 lbs.

FAQs

What type of compression does the MXR M291 Dyna Comp Mini offer?: The MXR M291 Dyna Comp Mini provides dynamic range compression with controls for output level and sensitivity, allowing you to adjust the amount of compression applied to your signal.
Is the MXR M291 Dyna Comp Mini suitable for live performances?: Yes, the MXR M291 Dyna Comp Mini is ideal for live performances due to its compact size and buffered bypass, ensuring consistent signal integrity and minimal tone loss.
Can the MXR M291 Dyna Comp Mini be powered by a battery?: No, the MXR M291 Dyna Comp Mini requires a 9V DC power supply, which is sold separately, and cannot be powered by a battery.
How does the MXR M291 Dyna Comp Mini differ from the standard Dyna Comp?: The MXR M291 Dyna Comp Mini offers the same classic compression in a smaller, pedalboard-friendly size with the added benefit of a buffered bypass to maintain signal clarity.
Does the MXR M291 Dyna Comp Mini work well with bass guitars?: Yes, the MXR M291 Dyna Comp Mini can be used with bass guitars, providing smooth compression that enhances sustain and clarity without compromising low-end frequencies.

Videos

Add video

Alvas LLC

Mini Compressor Shootout - Xotic SP vs Wampler Mini Ego vs MXR Dyna Comp Mini

Alvas LLC

MXR DYNA COMP MINI COMPRESSOR

jimdunlopusa

MXR Dyna Comp Mini Pedal Demo played by Ryan Wariner

Carter Vintage Guitars

MXR Dyna Comp Mini Compressor - Sound Demo (no talking)

Guitar Bonedo

MXR DYNA COMP MINI, demo by RICCARDO GIOGGI [ENG subs]

Riccardo Gioggi

Strings Direct TV | MXR Dyna Comp Mini Compressor Pedal - it's TINY!

stringsdirectTV

Effects & Pedals Arena Corner: MXR Dyna Comp Mini (Review and Demo)

SHY BOYZ

Do you need a compressor pedal? (MXR Dyna Comp Mini)

Strumwrite60

Reviews

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PROS

Great sound quality in a small package
Enhances "dirty clean" tone without muddiness
Offers transparent compression, dynamic to pick attack
Effective for managing volume differences with phasers/Wah pedals
Compact design frees up pedalboard space
Attack switch adds versatility
Easy to set up with no wrong settings
Works well as a clean boost
High-quality components and solid build
Reasonably priced for its performance

CONS

Some users may not prefer the fast-attack switch
Light indicator may malfunction after some weeks

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about MXR M291 Dyna Comp Mini.

Features and functionality

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The Dyna Comp Mini's attack switch is preferred for its simplicity, offering a more straightforward user experience compared to a knob-based control.
Source
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Some users experience distortion when the attack switch is engaged, particularly with high sensitivity settings, suggesting a design characteristic of the circuit.
Source

Comparisons

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The Dyna Comp Mini includes an attack control (misnamed, actually a release control), a feature not present in the Keeley mini compressor.
Source

Use cases and applications

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Pairing the Dyna Comp with a phaser is noted for achieving Little Feat tones, highlighting its versatility in crafting specific sounds.
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The pedal's simplicity and effectiveness make it a staple for some users, who use it consistently as their primary compression tool.
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The Dyna Comp Mini is often used as a "tonebox" for its unique squishy, compressed sound rather than for traditional dynamic control.
Source
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The pedal is favored as an "always-on" effect in certain setups, adding a consistent tonal thickness to guitar chains.
Source

User experience

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Owners transitioning from larger compressors appreciate the Dyna Comp Mini's compact size and simplicity, emphasizing its ease of use and portability.
Source
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Users report significant compression even at low sensitivity settings, with noticeable changes only occurring past 3 o'clock on the dial, highlighting a non-linear response.
Source

Setup and maintenance

0 0

Gain staging issues often arise with hotter pickups, requiring users to adjust amp settings or place the pedal after a volume-controlled pedal to prevent distortion.
Source

Critic Reviews

MXR Dyna Comp Mini Review - Premier Guitar

premierguitar.com

The MXR M291 Dyna Comp Mini impresses with its clean, transparent compression and added practicality in a smaller package. Its wide output range and effective attack switch are highlights, making it ideal for streamlined pedalboards. While some may miss the heavier vintage-style coloration, the Mini provides greater clarity and headroom, appealing to players seeking a cleaner sound. Overall, it’s a compact and economical choice for those who favor modern transparency over vintage squish.

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4.5 out of 5

Based on 4 Reviews and 19 Ratings

5 star

4 star

3 star

2 star

1 star

arnellderek

335

almost 3 years ago

Great an Wonderful

This evenly distributes the sound I swear may even raise the volume. I use it in an amp pedal setting does the job very well.

Roles:

Singer Guitarist Keyboardist

Genres:

Pop Hip Hop Funk / Soul

matteo_cola

152

almost 7 years ago

Subtle but lovely.

It's not one of those squashy in-your-face compressors, it tends to act more like a big amp with a little volume, hence some natural compression. Which is good, don't you think? Also very effective as a clean boost. Not a big fan of the fast-attack switch, but it's cool to have it.

yang

416

over 5 years ago

great

sound is good, but after couple weeks the light couldn't be turned on anymore

Roles:

Guitarist Composer

Genres:

Rock Pop Orchestra

jimmarchi1

41026

5 years ago over 5 years ago

and its probably surface mount parts, so not fun replacing a faulty diode :-(

oasisroses

almost 9 years ago

no regrets wotsoever.

I bought this to free up space in place of a CS-2. I was a bit sceptical due to the simple layout and fewer knobs but I couldn't be anymore wrong. I have this on all the time and set and forget. the attack knob is interesting and opens up a bit more customisation. built solid as a rock and come with a wall wart too. I don't think I will ever replace this comp.