Unison Research Sinfonia Anniversary

Fidelity Magazine heard tonal hues and dynamic changes in vivid detail, yet without spotlighting individual hi-fi effects. The reviewer also likened its presentation to a great wine: subtle, complex and lingering rather than excessive or analytical.

The listening experience was called real, reverent and even spiritual, pointing to a deeply immersive and musically communicative character. A muddy, midrange-heavy quality was noted on one live rock recording, but this was presented as a trait of that recording rather than a consistent amplifier coloration.

Dynamic shifts came through vividly, while deep synth lines and heavy drumbeats were handled effortlessly by the 27-watt Class-A output stage. The reviewer found initial concerns about the modest power rating unfounded, with the amplifier comfortably filling a substantial room through 88dB-sensitive speakers.

The amplifier projected music into the room with striking presence and seemed to detach the performance completely from the speakers. That strong disappearance effect suggests an unusually convincing and immersive stereo presentation.

The Anniversary edition drew emphatic praise for its flawless solid Sapelli-mahogany finish and substantial tactile feel. Its opposing-orientation toroidal transformers were also said to eliminate transformer hum effectively, leaving the amplifier whisper-quiet in use.

This is a deliberately minimalist analogue integrated amplifier, with four RCA inputs, a tape loop and speaker connections for 4- or 8-ohm operation. Useful touches include true bi-wiring capability, automatic tube biasing and a dedicated power connection for Unison Research's Simply Phono, though there is no onboard phono stage or DAC.

At a reported price range of roughly $5,650 to $8,799, this is a premium-priced amplifier, but Fidelity Magazine considered it fantastic value. The review specifically connected that conclusion to the Italian craftsmanship, materials and, above all, the sound quality.