Manley Labs Variable Mu® Mastering 2023 - Blue

The mastering standard for the world’s top engineers

• All-tube, all-transformer design for musical, cohesive sound
• Detented controls for precise, repeatable settings and recall
• Expanded modes and ratios for ultimate dynamic control
• The "glue" that holds the mix together for three decades

The mastering standard for the world’s top engineers

The Manley Variable Mu Mastering Edition is the definitive tool for mastering engineers who demand a musical and cohesive final product. This all-tube classic uses a unique variable gain vacuum tube to provide a uniquely smooth and transparent compression that acts like "glue" to a mix. Now with mastering-grade features like stepped controls and expanded ratios, it’s the ultimate version of a legend.

Uncompromising Precision for Critical Work

The Mastering Edition of the Variable Mu is designed for the surgical precision needed in mastering applications. Every knob, from Input and Output to Threshold and Attack, is a precision-stepped switch, replacing the continuous pots of the standard version. These controls allow for perfect, repeatable settings and effortless session recall, ensuring that your work is always consistent and accurate.

The Ultimate Dynamics Toolkit

The Mastering Variable Mu offers an expanded set of ratios and modes for unparalleled control. The "Compress" mode provides a gentle 1.5:1 ratio for adding density and warmth, while the "Limit" mode has a sharper knee with ratios up to 20:1 for powerful peak control. With a selectable High-Pass sidechain filter, you can tame dynamics without the low end causing unwanted "pumping". Preserve the punch and impact of your mixes while effortlessly adding modern loudness.

A Legacy of Loudness, Built for Fidelity

The Variable Mu is the culmination of Manley’s decades of analog excellence. Each unit is meticulously hand-crafted in California with a painstaking attention to detail, from the custom-wound Manley IRON® transformers to the hand-selected vacuum tubes. It's a timeless piece of gear, built to deliver the clean, loud, and impactful results that today’s engineers demand, all while imparting that iconic, rich, all-tube sound.

Ratios

1.5:1 (Compress), 4:1 to 20:1 (Limit)

Frequency Response

20 Hz – 25 kHz, ±0.1 dB

Max Output

+30 dBu

Noise Floor

-85 dB

Tubes

5670, 5751, 12BH7

Dimensions

19″ × 3.5″ × 10″ 

2U