Pricing and availability
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Price
Average Price: $61
Standard/Professional
$60
$161+
Price Tier
Budget
Standard
High-end
Price History
Based on price data from 1 merchant for "Mooer Slow Engine". Prices shown reflect NEW condition. Tracking began Apr 23, 2026.
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Description
Immerse yourself in the ethereal world of sound with the Mooer Slow Engine, your compact companion for creating mesmerizing volume swells with the simplicity and finesse of a maestro. This little powerhouse mimics the iconic Boss Slow Gear effect, delivering the expansive soundscape of your dreams without breaking the bank or monopolizing pedalboard real estate. With its intuitive two-knob design, crafting your sonic signature has never been easier or more accessible. Whether you're weaving ambient textures, diving into the depths of post-rock, or painting new wave landscapes, the Slow Engine is your brush, your palette, and your canvas, all in a petite, pedalboard-friendly package.
Key Features:
- Emulates the classic Boss Slow Gear effect
- Compact design ideal for pedalboard optimization
- Simple, user-friendly two-knob interface (Sense and Attack) for easy sound sculpting
- Perfect for genres like post-rock, ambient, and new wave
Product specs
| Available since | March 2014 |
| Effect Types | Volume |
FAQs
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What effect does the Mooer Slow Engine pedal produce?
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The Mooer Slow Engine creates a volume swell effect, simulating a violin-like sound by gradually increasing the volume of each note or chord, similar to an automatic volume pedal.
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Is the Mooer Slow Engine suitable for both guitar and bass?
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Yes, the Mooer Slow Engine can be used with both electric guitar and bass, offering a unique volume swell effect that is versatile across different instruments.
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Does the Mooer Slow Engine require a specific power supply?
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The Mooer Slow Engine requires a standard 9V DC power supply, which is common for most guitar pedals. Ensure it matches the center-negative configuration typical for pedalboards.
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How does the Mooer Slow Engine compare to the Boss Slow Gear?
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The Mooer Slow Engine is often compared to the Boss Slow Gear as it replicates the attack delay effect, providing a similar automatic volume swell function in a more compact and affordable format.
Videos
MooerAudio
Mooer Slow Engine pedal DEMO
Reviews
PROS
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Ideal for creating swelling legato solos and ambient volume swells
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Offers a cost-effective alternative to pricier "collector's item" pedals
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Compact size fits well on crowded pedalboards
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Provides unique tonal coloring, adding a subtle, oriental effect
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Simple, easy-to-use design with straightforward functionality
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Allows for fine-tuning to achieve the desired bowing effect
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Compatible with multiple instruments, including bass and guitar
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Enhances sound when used with other modulation and reverb pedals
CONS
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Limited functionality with the sense control
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Some users experience difficulty in triggering the effect correctly
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Not as effective as a volume pedal for some techniques
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Effect can be too subtle on its own without additional effects
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Mooer Slow Engine.
Features and functionality
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The Mooer Slow Engine is praised for its quick, consistent auto-swell effect, which users find difficult to replicate with volume knobs or pedals.
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The pedal's setup is straightforward, involving sensitivity input and ramp-up value adjustments, making it user-friendly and space-efficient compared to a volume pedal.
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The Mooer Slow Engine exhibits a volume drop, especially noticeable at slower swell speeds, affecting the max level achievable.
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Comparisons
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Users find the Slow Engine more effective than the auto-swell in the Walrus SLO for quick and consistent swells.
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Use cases and applications
Value and pricing
Setup and maintenance
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Positioning the pedal early in the chain, preferably after a tuner, helps maintain its swell effect when using high-gain pedals.
Source
Critic Reviews
4.0 out of 5
Based on 3 Reviews and 24 Ratings
130
Modest
It does its job well, considering it's a slow attack pedal, but it isn't very useful on its own, it is very subtle, you almost can't hear it. When you use it along with other modulation pedals and delay/echo/reverb it adds a sound for ambient soundscapes, etc.
235
111
Boss Slow Gear clone
I've wanted a Slow Gear for a very long time. The Mooer is every bit as complex as the Boss. This pedal is not for everyone but those who are looking to add a bit of swell to their sound will be pleasantly surprised at what this pedal can do for the cost.
Artist usage
Add artist
In this video interview, you can see the Mooer Slow engine pedal to the very right of Jeremy's pedal board at around 4:32 of the video, after in 6:17 he talks about it and uses it: "This pedal is really cool; Slow Engine, its kind of like a swell delay but just that's the only function" 6:30 "That with much of verb sounds sick".
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use Mooer Slow Engine, it is most commonly used with the following gear.
Community setups
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