The Purple Audio Lilpeqr M is a 500-series mastering equalizer module designed to bring analog warmth and vintage tone-shaping flexibility to mixing and mastering workflows.

Overview

The Lilpeqr M is a two-band program EQ built by Purple Audio and designed by Eisen Audio. It emulates the sonic characteristics of classic vintage tube EQs such as the Lang PEQ-1 and Klangfilm RZ062 but uses a compact solid-state design compatible with standard 500-series racks. It is particularly well-suited for mix bus and mastering applications, where subtle tonal enhancement and recall precision are crucial.

Key Features

• Two-band shelving EQ: One high and one low-frequency band, each offering three selectable corner frequencies.youtube​

• Stepped potentiometers: For precise recall and stereo matching, exclusive to the “M” mastering version.

• Switchable operating modes:

  • Bypass (“BYP”) – for before/after signal comparison (LED green).

  • Program mode (“IN”) – for passive tone processing with natural, open bandwidth (LED off).

  • Buffered mode (“IN+Level”) – activates a discrete Class A buffer and level control for tighter response and focused sound (LED red).

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