Manley Mastering Variable Mu

5,819.00 (including VAT @ 23%)

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Estimated delivery to you: 19th December 2016
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1 year warranty and 30 day money back guarantee included

1 year warranty and 30 day money back guarantee included

Once the product is delivered, you have 30 days to decide that you definitely want to keep it. If you decide it is not suitable for any reason, you can return it back to us for replacement or full refund, including standard delivery charges.

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Product Ref: 75867

  • Continuously Variable Threshold
  • Switch for Limit or Compress Modes
  • Large Illuminated Sifam Meters
  • Greyhill Film Coated Stepped Switches
  • Balanced Inputs & Outputs

Manley Mastering Variable Mu

The Manley Mastering Variable Mu is a development of Manley's flagship professional compressor, with adjustable attack and release optimised for mixing and mastering. The Mastering Variable Mu combines a hand crafted, rack mountable design whilst adding clarity and cohesion to stereo buses or your entire mix. With upgraded switches and integrated bias adjustments, the Mastering Variable Mu is the perfect device for your professional mastering needs.

Product Ref: 75867

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Full Description

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Upgraded Switches, Perfect for Mastering

The Mastering Variable Mu utilises very high quality Greyhill film coated stepped switches rather than the variable potentiometers found on the standard version of the Variable Mu. The upgraded switches allow for accurate gradients and recall on sessions, valued greatly by many mastering engineers around the world.

Definition and Fidelity

The Mastering Variable Mu is solely built to add definition and fidelity to individual tracks, stereo buses, or an entire mix. The classical, transparent character which the Mastering Variable Mu has to offer makes this compressor perfect for infusing warm harmonic content into your audio, free of audible compression artifacts.

Parameter Linking

The Mastering Variable Mu features parameter linking to allow adjustments of two channels with stereo signals simultaneously. The integrated high pass sisdechain filter can also prevent compression response to frequencies lower than 100 Hz so that you can maintain punch and clarity in the low-end. The Mastering Variable Mu also offers plug-in-only controls such as headroom and dry/wet mix. This provides easy access to parallel compression ideal for quickly polishing background vocals or a drum bus, whilst the headroom control lets you adjust the Mastering Variable Mu’s level to your preference.


  • Continuously variable Threshold
  • Grayhill film coated stepped switches
  • Trip Potentiometers for adjusting bias
  • Switch for Limit or Compress modes
  • Front panel mounted Meter Adjust
  • Limit (4:1 to 20:1) or Compress (1.5:1)
  • Large Illuminated Sifam Meters
  • Stereo Link Switch
  • Independently regulated B+ and Heater supplies
  • Includes HP Sidechain modification as standard
  • Hard-wire Bypass switch
  • Silent conductive plastic input attenuator
  • Balanced Inputs & Outputs
  • Fully differential all-tube circuitry using one each 5670, 5751, 7044, & 12AL5 per channel
  • Manley input & output transformers with pure nickel laminations in mu-metal case with flat frequency response


  • Frequency Response: 20Hz-25KHz
  • Recovery 5 steps: 0.2s, 0.4s, 0.6s, 4sec., 8sec. (Not a 12-step recovery)
  • Variable Attack: 25msec-70msec
  • Maximum gain: 35 dB
  • Input: -4 to +4 in 2 dB steps
  • Output: -11 to 0 in 1/2 dB steps (24 detents)
  • Threshold: -11 to +1 in 1/2 dB steps (24 detents)
  • Attack: 11 positions
  • Release: 5 positions
  • -85dB typical
  • Max. output: +30dBm (26Vrms) 26dB Headroom
  • Power consumption (120/240VAC): 80 watts
  • Shipping weight: 23 lbs.
  • Number of Channels: 2
  • Controls: Recovery, Output, Threshold, Attack
  • Ratio: Limit: (4:1 to 20:1) or COMPRESS: (1.5 to 1)
  • Frequency Response: 20Hz-25KHz
  • Inputs: 2 x XLR
  • Outputs: 2 x XLR
  • Rack Spaces : 2U
  • Height: 3.5"
  • Depth: 13.5"
  • Width: 19"
Your order may be delivered with a plug adapter
If any electrical items in your order are supplied with a United Kingdom plug connection, a suitable plug conversion adapter will be included free of charge.