Sigma

About the Sigma

The Shunyata Research Sigma Reference Speaker Cable is engineered for high-end audio systems, delivering exceptional musical immersion and technical excellence. It features advanced proprietary technologies including TAPc (Transverse Axial Polarizer) for reducing micro-phase distortions, resulting in a clear, open, and focused soundstage. HARP (Highly Advanced Resonance Processing) technology minimizes cable-induced noise by controlling phase distortions and signal reflections, enhancing resolution and coherence. The cable uses VTX-Ag conductors—a hybrid of pure silver and copper in a coaxial geometry—combining the speed and clarity of silver with the warmth and weight of copper for a full-bodied, balanced sound across all frequencies. The KPIP v2 (Kinetic Phase Inversion Process) conditions the conductors, reducing break-in time and maximizing sonic performance. The cable is rigorously tested for continuity, polarity, and insulation integrity.