Retro Instruments is a boutique American pro audio manufacturer specializing in vintage-inspired analog compressors, limiters, and equalizers. Founded by Phil Moore, the company is known for products such as the Sta-Level Tube Compressor and 176 Limiting Amplifier, which combine classic tube character with modern reliability and flexibility. Hand-built in the USA, Retro Instruments gear is trusted by engineers and producers for rich harmonics, smooth dynamics, and authentic analog warmth.