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Unison Research Unico 90
Unico 90 is a class AB hybrid integrated amplifier with zero feedback, as the most precious valve amplifiers uses only two stages. The heart of the Unico 90 circuit is found in its hybrid structure. All of the gain, and subsequently the “character” of the amp, is determined by the only tube stage made with ECC83 and ECC 81in particular multiple-parallel-totem-pole.
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Professional Reviews 87/100
Nicely Roasted
Sound Quality
90/100
Build Quality
80/100
Features Connectivity
84/100
Value for Money
85/100
The Unico 90 marries valve warmth with solid-state bass grip, delivering a harmoniously detailed sound that stays punchy on rock and eloquent with voices. AVComfort hears clarity, tonal richness and low-level detail without sacrificing scale. With 160W per channel into 4 ohms, its hybrid authority makes an engrossing centrepiece for ambitious analogue systems.
What Reviewers Are Saying
Pros
Coherent hybrid voicing combines melodic tonal richness and fine detail without sounding analytically disjointed.
Taut, convincing bass and kick-drum impact give rock and metal real drive.
Clear, clean presentation retrieves subtle low-frequency information and vocal nuance.
&
Cons
Large, substantial 20kg chassis demands meaningful rack space.
The valve stage requires a short warm-up period after switch-on.
SOUND QUALITY PERFORMANCE 90/100
The available review describes a notably coherent hybrid presentation, combining tube-like melodic flow with solid-state control rather than letting either character dominate. It particularly praises clarity, fine detail, tonal richness and bass definition, while offering little direct comment on stereo imaging.
Transparency Resolution
94/100
AVComfort calls the sound exceptionally clear and clean, saying each frequency range is worked through down to small details. The reviewer also hears low-bass information that can be missed through other systems, suggesting strong retrieval of subtle musical content.
Tonal Balance Musicality
95/100
The reviewer repeatedly praises the Unico 90's harmonious, melodic presentation and says there is little they would want to change. Detail is said to arrive with cohesion rather than analytical separation, while the hybrid design successfully combines the appealing qualities associated with valves and transistors.
Dynamics
91/100
The review highlights an unusually taut, convincing kick-drum impact on Metallica and AC/DC material, an area where valve amplification is often less assured. Its 160W-per-channel output into 4 ohms should also give it useful scope with demanding loudspeakers, though listening comments on large-scale dynamic swings are limited.
Soundstage Imaging
80/100
The supplied review does not directly assess stage width, depth, image placement or layering. Its comments on scale and coherent presentation are encouraging, but they do not establish how precisely the amplifier creates a stereo image.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
80/100
The supplied review concentrates on listening rather than casework, internal execution or long-term reliability. The specifications describe a substantial 20kg chassis and a thermostable Class AB output stage, but reviewers say little about construction quality in use.
Features Connectivity
84/100
The Unico 90 provides six line-level inputs, including two balanced XLR pairs and a dedicated bypass input, plus tape and volume-controlled subwoofer outputs. It is otherwise a focused analogue integrated amplifier, with no stated phono stage, DAC, streaming, headphone socket or digital inputs.
Value for Money
85/100
At approximately $4,500-$5,999, the Unico 90 occupies a premium integrated-amplifier segment and offers substantial power alongside balanced inputs and a tube/solid-state circuit. The available review is strongly enthusiastic about its sound, but does not directly compare its asking price with competing amplifiers or make a specific value claim.
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Verified Dealers
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Authorized dealers for Unison Research Unico 90
- Absoulute Audio plus Video — in-store — Aiken, South Carolina, United States (website)
- Holt Hill — online and in-store — Andover, Massachusetts, United States (website)
- The Music Room — online and in-store — Erie, Colorado, United States (website)
- Acoustic Technologies — online and in-store — Montréal, Québec, Canada (website)
- Altitudo Audio — online and in-store — Winnipeg, Manitoba, Canada (website)
- Analog Matters — online and in-store — Ormond Beach, Florida, United States (website)
- Analogue Seduction — online and in-store — Whittlesey, England, United Kingdom (website)
- Assai Audio — in-store — Centro, Comunidad de Madrid, Spain (website)
- Atelier 13 Audio — in-store — Forest Hills, Tennessee, United States (website)
- Audio Centrum — Hungary (website)
and 72 more verified dealers