This plugin delivers an authentic emulation of the classic German U73b broadcast compressor and limiter, a staple in European mastering studios between 1960 and 1980. It faithfully reproduces the all-tube vary-mu design, preserving the original circuit’s character while adding modern enhancements for ease of use. The plugin maintains the vintage sound with its unique compression qualities, offering an adjustable release time and a user-friendly interface that remains true to the original hardware.

Designed for mastering as well as mixing applications, the U73b excels on drums, bass, guitar, vocals, and voiceovers, adding warmth and smooth dynamic control. It features a compressor/limiter switch that allows selection between gentle compression and more aggressive limiting, both with a smooth knee for musical responsiveness. Additional features include input and output gain controls for precise level adjustment, a VU meter for monitoring, and selectable sidechain options to tailor the compression trigger source.

The compressor’s controls are straightforward but impactful, enabling immediate audible results. Release times can be fixed or program-dependent, allowing dynamic response to different audio material. This plugin is ideal for audio professionals seeking the rich, warm compression sound characteristic of vintage broadcast gear, combined with the convenience and flexibility of modern digital tools.