Used Symetrix 421m Compressor

This used Symetrix 421m Compressor is a dependable, good-condition dynamics processor for tightening vocals, bass, and instruments in studio or live rigs. The 421m provides smooth, musical compression with fast response and straightforward controls for threshold, ratio, attack, release, and output gain, plus switchable hard/soft knee behavior. Built for rackmount systems and designed for low-noise, professional line-level operation, it’s a reliable choice for clean level control and punchy, consistent mixes.