Unison Research - Unico Due - Integrated Amplifier

Hybrid Design. Serious Musical Authority. The Unico Due is the latest evolution of Unison Research’s hybrid integrated amplifier design — pairing a tube preamplifier stage with a powerful, high-current solid-state output section. Designed and built in Italy, it refines the Unico platform with a redesigned circuit, upgraded power supply architecture, and enhanced output stage engineering. The result: warmth and dimensionality without sacrificing grip, dynamics, or control. Tube Soul. Solid-State Control. At its core are two ECC83 (12AX7) valves — one per channel — configured as a gain stage followed by a cathode follower. This gives the Unico Due its tonal character: harmonic richness, depth, and natural spatial presentation. The output stage operates in Dynamic Class A bias, meaning the output devices never fully switch off. This reduces distortion at low listening levels and preserves clarity during quieter passages. Unison Research’s “Super-Symmetric” topology uses a careful