Pricing and availability

We compare 600+ stores and found this item at 8 stores. Prices updated .

Sweetwater
5.0 (18)
$4,999.00
Guitar Center
$4,999.00
Amazon
5.0 (2)
$4,999.00
Reverb
5.0 (1)
$3,150.00 3 available Used
Musician's Friend
5.0 (1)
$4,999.00
B&H
$4,999.00
Thomann
5.0 (9)
$4,599.00 $4,590.00 $9.00 · All time low
Vintage King
5.0 (3)
$6,599.00

Average Price: $4,917

High-end/Boutique

$100

$501+

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High-end

Price History

Based on price data from 7 merchants for "Manley Variable Mu". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

The Manley Variable Mu is a stereo tube compressor/limiter that embodies the essence of vintage sound with modern innovation. Inspired by the legendary Fairchild limiter, this professional-grade signal processor is a staple in studios globally, renowned for its exceptional vocal processing capabilities. Unlike typical compressors that rely on VCA or optical cells, the Variable Mu employs a remote-cutoff tube for its gain reduction, providing a distinctively smooth, musical compression that engineers and producers adore.

This unit has evolved over the years, with contemporary models incorporating sidechain highpass filters for enhanced flexibility in shaping your sound. While earlier models used the iconic 6386 tubes, most current versions utilize 5670 tubes, with the option for modifications to accommodate 6BA6 tubes for audio purists seeking a closer match to the Fairchild's signature tone.

The Variable Mu is more than just a compressor; it's a dynamic tool that infuses warmth and character into any mix, making it ideal for vocals, drums, and even entire mixes. Its intuitive controls and robust build ensure that it remains a reliable and creative asset in any recording environment.

Key Features:

  • Stereo tube compressor/limiter with remote-cutoff tube for gain reduction
  • Sidechain highpass filters in modern units for enhanced control
  • Uses 5670 tubes, with modding options for 6BA6 tubes
  • Ideal for vocal processing and various studio applications
  • Renowned for its smooth, musical compression and vintage-inspired sound

Product specs

Brand Manley Labs
Model Variable MU Stereo Tube Compressor Limiter
Finish Purple
Year 2000s
Made In United States
Categories Compressors and Limiters

FAQs

What type of compressor is the Manley Variable Mu?

The Manley Variable Mu is a tube-based variable-mu compressor, known for its ability to provide smooth and musical gain reduction, making it ideal for mastering and bus compression.

What is the compression ratio of the Manley Variable Mu?

In compression mode, the Manley Variable Mu offers a soft-knee ratio starting at 1.5:1. In limit mode, the ratio begins at 4:1 and can increase up to 20:1 with more gain reduction.

Is the Manley Variable Mu suitable for mastering?

Yes, the Manley Variable Mu is highly regarded for mastering due to its ability to add warmth and cohesion, making it a favored choice for mix bus and mastering applications.

Does the Manley Variable Mu have balanced inputs and outputs?

Yes, the Manley Variable Mu features balanced inputs and outputs with 600-ohm impedance, ensuring optimal signal integrity and compatibility with professional audio equipment.

Can the Manley Variable Mu be used in a stereo setup?

Yes, the Manley Variable Mu includes a stereo link switch, allowing for coherent stereo operation, and multiple units can be linked for surround sound processing if custom-ordered.

manleylabs

manleylabs

Richard Devine: Manley Variable Mu and Massive Passive Mix Bus Demo

Video thumbnail for Richard Devine: Manley Variable Mu and Massive Passive Mix Bus Demo by manleylabs

Richard Devine: Manley Variable Mu and Massive Passive Mix Bus Demo

manleylabs

manleylabs

Video thumbnail for Compressor Shoot Out: Manley Variable MU VS Brainworx VSC-2 by sonicstate

Compressor Shoot Out: Manley Variable MU VS Brainworx VSC-2

sonicstate

sonicstate

Video thumbnail for Master Bus Compressor Shootout: SSL 4000 G vs. Shadow Hills vs. Manley Variable Mu by Black Ghost Audio

Master Bus Compressor Shootout: SSL 4000 G vs. Shadow Hills vs. Manley Variable Mu

Black Ghost Audio

Black Ghost Audio

Video thumbnail for The History of the Manley Variable Mu® by manleylabs

The History of the Manley Variable Mu®

manleylabs

manleylabs

Video thumbnail for Vance and Lance and the Manley Variable Mu® by manleylabs

Vance and Lance and the Manley Variable Mu®

manleylabs

manleylabs

Video thumbnail for Manley Variable Mu Overview - Sweetwater by Sweetwater

Manley Variable Mu Overview - Sweetwater

Sweetwater

Sweetwater

Video thumbnail for Is the Manley Vari Mu the Best Mastering Compressor? by Jay Maas Recording

Is the Manley Vari Mu the Best Mastering Compressor?

Jay Maas Recording

Jay Maas Recording

Video thumbnail for Manley Variable Mu Limiter Compressor by Retrosonic Pro Audio

Manley Variable Mu Limiter Compressor

Retrosonic Pro Audio

Retrosonic Pro Audio

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Manley Variable Mu.

Comparisons

  • The Manley Variable Mu is described as clean and gluing, great for pop vocals and mix bus, while the RHEA is faster, grittier, and better for drums and rock vocals.

    Source

Use cases and applications

  • The Manley Variable Mu is noted to add color when pushed hard, suitable for rhythm instruments like electric guitars and synths, but less ideal for vocals unless the singer is exceptional.

    Source
  • The Manley Variable Mu is used in a unique technique where vocals and bass are run through separate channels in series, first limiting then compressing, to achieve unexpected tube saturation.

    Source
  • It’s been noted that the Manley Variable Mu can be effectively used on lush pads and legato bass synths, adding warmth and cohesion to overly bright sources like soprano sax and trumpet.

    Source
  • For heavy distorted guitars, using the Manley in Limit Mode with the slowest attack and fastest release settings adds sheen and warmth, while controlling dynamics effectively.

    Source
  • On overheads, the Manley Variable Mu provides warmth to harsh sounds, sometimes adding subtle compression, enhancing the overall tonal balance.

    Source

Software and compatibility

  • The Manley Variable Mu plugin is considered inferior to the hardware, with noticeable differences that even inexperienced listeners can detect in blind tests.

    Source

Features and functionality

  • The Manley Variable Mu, when used as a sidechain compressor, can deliver a fluid and interesting effect by linking channels and manipulating limiter versus compressor settings.

    Source

5.0 out of 5

Based on 0 Reviews and 3 Ratings

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Artist usage

Add artist
See how Owl City uses Manley Variable Mu

Owl City

Singer, Guitarist

...
Verified via Ayoungmusic

Owl City's studio, Sky Harbor, contains one Manley Variable Mu.

See how AN21 uses Manley Variable Mu

AN21

Music Producer, DJ

...
Verified via Photo

Two units down from the Teletronix unit on the left, the Manley Variable MU can be spotted in AN21's studio.

See how Martin Doherty uses Manley Variable Mu

Martin Doherty

Singer, Music Producer

The Twilight Sad

...
Verified via Youtube

In a video featured in the October issue of Sound on Sound Magazine, Martin Doherty's studio setup includes a Manley Variable Mu Compressor, visible at the top of a hardware rack.

See how Mathew Jonson uses Manley Variable Mu

Mathew Jonson

Music Producer

Cobblestone Jazz

...
Verified via YouTube

In his Studio Tour Feature for FACT Magazine, Mathew Jonson's Manley Variable Mu compressor can be seen at at 4:11.

See how Marc Kinchen uses Manley Variable Mu

Marc Kinchen

Music Producer

...
Verified via Photo

Marc Kinchen shared this picture of his studio rack which includes the Manley Variable Mu.

See how Shlomi Aber uses Manley Variable Mu

Shlomi Aber

Composer, Music Producer

Guy Gerber & Shlomi Aber

...
Verified via Attack Magazine

One of the main highlights of my studio. I can’t see myself producing without having the Manley somewhere in my input and output chain. The latest version has this fantastic high-pass option to filter the input into the old-school tube compressor, which helps to keep the dynamics alive and not over-squeeze the track while having hard compression.

See how Colin Sipos uses Manley Variable Mu

Colin Sipos

Audio Engineer

...
Verified via YouTube

In a studio tour video titled "EPIC HOME STUDIO Setup | Colin Sipos" by Andrew Masters on YouTube, a Manley Variable Mu limiter compressor is visibly integrated into the rack on Colin Sipos' work desk at the 11:34 timestamp.

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 Manley Variable Mu, it is most commonly used with the following gear.

Community setups

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A

andreifossari

Gear IQ 171

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