The Universal Audio Manley Variable Mu® Limiter Compressor Plug-In is a unique blend of vintage and modern technology. This plugin is a faithful emulation of the original hardware, renowned for its smooth, musical compression and transparency. It is an industry-standard mastering tool used on countless hit records. Its dual-mono or stereo application flexibility makes it the perfect choice for both mixing and mastering tasks.

Unlike many compressors, the Variable Mu® offers true variable gain, thanks to the 5670 dual triode at the heart of its peak-reduction and compression action. This feature, coupled with the transformer-coupled all-tube circuitry, ensures the Variable Mu® delivers a unique and highly effective gain reduction behavior. The sound is warmer, punchier, and more refined than ever, allowing your mix to shine through with professional, radio-ready quality.

Whether you're looking for light leveling or heavy limiting, the Variable Mu® has you covered. It's also perfect for dual-mono or stereo applications, with separate threshold, attack, release, and output controls. The stereo link switch is particularly useful for mastering your final mixes, providing a cohesive, unified sound that is often described as pouring "sweet cream" over your mix.

Key Features: - Rotary switches with detented steps for precise channel matching and settings recall - Manley input and output transformers with pure nickel laminations in mu-metal case - All-tube circuitry using one 5751, 7044, and 12AL5 per channel - Variable Gain vacuum tube (per channel): 5670 - Balanced Inputs and Outputs - Flat frequency response from 20Hz–25kHz - Continuously variable Threshold - Silent conductive plastic input attenuator - Recovery 5 steps: 0.2s, 0.4s, 0.6s, 4sec, 8sec - Variable Attack: 25msec–70msec - Limit (4:1 to 20:1) or Compress (1.5:1) - Large Illuminated Sifam Meters - Handcrafted in Chino, CA - Maximum gain: 35 dB - Maximum Output: +30 dBu (26Vrms) 26 dB Headroom <0.1% THD @ 1KHz Noise floor: -85 dB typical

Owner's manual

Product specs

FAQs

What is the primary function of the Universal Audio Manley Variable Mu® Limiter Compressor Plug-In?

This plug-in emulates the classic Vari-Mu tube compressor, known for adding warmth and cohesion to mixes. It's typically used on the master bus to achieve a polished, professional sound.

Does the Manley Variable Mu Plug-In work well for mastering?

Yes, the Manley Variable Mu Plug-In is highly regarded for mastering due to its smooth compression characteristics and ability to glue a mix together without losing clarity.

How does the Universal Audio Manley Variable Mu® Plug-In differ from other compressor types?

Unlike VCA or FET compressors, the Manley Variable Mu® uses a tube-based design that offers a more musical and forgiving compression, ideal for adding warmth and color to audio.

Is the Universal Audio Manley Variable Mu® Plug-In compatible with all DAWs?

The plug-in is compatible with most major DAWs that support UAD plug-ins, including Ableton Live, Pro Tools, and Logic Pro, provided you have a UAD-2 hardware device.

Can the Manley Variable Mu Plug-In be used on individual tracks?

While primarily used for bus compression, it can also be applied to individual tracks to add character and smooth dynamics, especially on vocals and acoustic instruments.