NUDE Microphones - There's more than a few audio engineers who would say the UA-175 series compressor/limiters are the best sounding ever made....A set 12:1 ratio… based around the 108 tube preamp,
Universal Audio 175A Schematic
1176 Peak Limiter - Wikipedia
Universal Audio / UA 175B and 176 Tube Compressor Collection/ Universal Audio 創立者の最高傑作 / UAD Spark - 吉田将樹 Official Site
Universal Audio 175B Compressor / Limiter | Reverb Brazil