Unison Research

Unison Research for more than 20 years is appreciated all over the world . From the beginning our goal has been to provide enjoyment through listening to music . Simple goal but a life experience: valves and electronic mixed design . And passion , the real one.


Unison Research was founded in 1987 by a group of passionate audiophiles led by Giovanni Maria Sacchetti. Born in 1945, Giovanni Maria Sacchetti devoted himself at an early age to the study and design of hi-fi systems, combining his interest in electronics with a passion for music inherited from his father, an expert pianist.After completing his studies in electronics, he devoted twenty-five years to teaching while at the same time designing and developing amplifiers for Unison Research.


The first integrated amplifier he designed for Unison Research was the TRIODE20. Its successor, the SIMPLY TWO, was a key step forward in the company's history—this legendary amplifier was instrumental in achieving great international success for Unison Research in a relatively short time.


Our experience has increased over the years, along with our continuing research of high performance and high quality standards. This has led Unison Research to both historical achievements and great value when it comes to the development of our products. Best of all, we have achieved this through a completely Italian operation…from design to production.


Unison Research is now recognized as the Italian leader in the production of tube amplifiers, and among the top ten in Europe.


Unison Research has been admired and appreciated worldwide over the last 20 years. From the beginning, our goal has always been to convey pleasure by listening to music. We have focused our experience on the production of valves and on the design of hybrid electronics. It takes real passion to create products that provide the gift of timeless pleasure.

All Unison Research products are characterized by an elegant style, and the care with which wood and metal parts are selected for each design. It’s a quality that is recognized and appreciated worldwide.

We firmly believe that a system of high-fidelity music reproduction should not only be a pleasure to hear, but to see as well.

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Unison Research Phono One

Unison Research's flagship phono stage

Unison Research Preludio

Ultra-linear integrated valve amp

Unison Research SH Headphone A...

A first class valve driven headphone amplifier.

Unison Research Simply Italy

One of the finest compact valve amplifiers available

Unison Research Simply Phono

A pure Class A valve phono stage with switchable settings

Unison Research Sinfonia

This dual mono design boasts a true high-end sound performance.

Unison Research Triode 25

The Triode 25 is a high-end push-pull valve amplifier with a DSD-compatible USB DAC.

Unison Research Unico 150

Top of the Range Integrated hybrid valve amplifier

Unison Research Unico 90

Integrated hybrid valve amplifier

Unison Research Unico CD Due

An audiophile CD player and DAC with aptX Bluetooth

Unison Research Unico CD Primo

A high-quality CD player with an additional USB DAC input

Unison Research Unico Nuovo

The Second model in the hybrid Unico range

Unison Research Unico Primo

The entry-level model in the hybrid Unico range

Unison Research Unico Secondo

An excellent mid-range hybrid integrated amplifier with a built-in phono stage