Unison Research Simply 845 tube integrated amplifier with exposed tubes

Unison Research Valve Amplifiers

Unison Research's valve amplifier line represents the purest expression of Italian tube amplification. These are not hybrids: every stage, from input to output, runs on vacuum tubes. The range spans single-ended, pure Class A designs like the Simply 845, Simply Italy Black Edition and S6 Black Edition to the push-pull Triode 25 Black Edition, with power outputs from 10 to 50 watts per channel.

Each amplifier is hand-wired with point-to-point soldering in Dosson di Casier, Italy, using premium transformers and carefully selected tube sets. Whether you choose the intimate warmth of a single-ended triode or the dynamic authority of a push-pull pentode design, these amplifiers deliver the dimensionality, tonal richness, and musical presence that only an all-tube signal path can provide. The Simply Italy, Triode 25 and S6 now come only as Black Edition models.