Kolin Free Vintage Limiter/Compressor Plugin

Kolin Free Vintage Limiter/Compressor Plugin

Kolin is a free vintage-style limiting amp plugin emulation of the Collins 26U-1 Vari-Mu compressor/limiter from the 1950s and early 1960s.

The plugin carefully emulates the original equipment circuit, transformers and tubes. Unlike the original hardware, Kolin comes with attack & release, dry/wet mix, and HPF sidechain, allowing more control over the signal.


  • Attack time (A-Adjust) from 1 millisecond to 50 milliseconds
  • Release time (R-Adjust) from 0.1 seconds to 3 seconds
  • Mix to blend dry/wet signal
  • High-pass sidechain from 20Hz to 500Hz
  • External sidechain
  • Input: 40dB gain compensated input control
  • Output: +/- 20dB output control
  • The “Analog Obsession” label is clickable; it engages oversampling (4x)

Kolin is available in VST/VST3, AU for macOS, and VST/VST3 for Windows. This plugin is part of the NOS Bundle at Analog Obsession.

Supported platforms & download

Windows | macOS

Analog Obsession

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