PSI Audio is a Swiss manufacturer of high-precision active studio monitors, founded in 1977 and based in Yverdon-les-Bains. Known for their fully analog signal paths without DSP, PSI monitors are engineered for absolute transparency and natural sound reproduction. The company uses proprietary technologies like Compensated Phase Response (CPR) and Adaptive Output Impedance (AOI) to achieve exceptional accuracy and coherence. Each unit is handcrafted and individually calibrated for consistency. Ranging from compact nearfields to large three-way systems, PSI Audio products are trusted by professionals for mixing, mastering, and critical listening applications.