Unison Research Valve user
Unison Research Valve
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.
We’ve taken what we’ve learned from designing our largest amplifiers, and applied to this small yet brilliant gem. The Simply Italy integrated amplifier builds on the legendary strengths of the Unison Research Simply Two, one of the most successful integrated amplifier designs in the world. This new integrated amplifier, thanks to more efficient engineering, provides better sound quality as well as better reliability and tube life.
Valve complement: 2 x ECC82 (12AU7)
2 x EL34 (6CA7)
Power consumption: 85 watt
Fuses: T2A from 100V to 130V
T1A from 220V to 240V
Dimensions (mm.): 26 cm x 35 cm x H. 19cm
Net weight: 15kg
The Unison S6 integrated amplifier offers personality, refinement and aesthetics…and a totally new amplifier design from a mechanical standpoint. The latest version of our S6 has been steadily updated and improved over the years to the point where it is easily one of the most respected integrated amplifiers in the world. The contrasting highlights of the wooden inlays on the front panel also reveal the technical sophistication of this amplifier, emphasizing the pride of ownership that comes with the term “Made in Italy.”
The latest version of the classic S9 integrated amplifier offers more power and a new aesthetic form, all without sacrificing its impressive tonal characteristics or its strong performance to price ratio. The result of our extensive experience in the design and manufacture of integrated amplifiers, the S9 is the perfect symphony between these both of these elements. The output stages of the S9 are similar to its predecessor, but the functional aesthetics and the use of different tubes take the S9 to a new level of performance.
Part of our classic line of tube amplifiers that include the Sinfonia and the Performance, the Preludio integrated amplifier continues the technical approach, sound and aesthetics of its larger siblings. While the Preludio’s appearance is certainly gorgeous, it is also extremely reliable due to its unique design solutions, quality materials and adherence to the highest of standards.
Part of our classic line of tube amplifiers that include the Preludio and the Performance, the Sinfonia integrated amplifier retains the technical approach, sound and beautiful aesthetics found in the rest of the line. While the Sinfonia offers both stunning looks and equally stunning sound, it is also extremely reliable due to its unique design solutions, quality materials and the highest of build quality standards.
In the twenty years we have been designing and building audio products, we have always listened to the concerns and comments of our customers worldwide. We realized that over time, those customer needs have changed. In response, we have given a different look to many of our products, and we’ve updated some of our most classic and beloved designs. The latest version of the legendary Performance integrated amplifier offers increased power while staying true to the look of the original—an icon of rare elegance and musical pleasure.
Output Stage: single ended parallel ultralinare A class
Output Power: 45 W / channel
Inputs: 4 line, 1 tape
Input Impedance: 47 kOhm
Outputs: 1 tape, loudspeakers bi-wiring
Output Impedance: 4 – 8 ohm
Feedback factor: 16 dB
Frequency Response: 20 Hz – 30 kHz
Valves: 6 x 6550/KT88 , 2 x ECC82 , 2 x ECC83
Remote Control: IR inputs and volume
Power Consumption: 500VA max
Dimension: 60cm x 48cm x 23,5 cm.
Net Weight: 50 Kg
The popular American magazine The Absolute Sound first picked the Absolute 845 as the best product of 1994. After more than 20 years, the Absolute is still ranked first overall in tube amps with a score higher than any other amplifier. No other audio product has remained at the top of its class for so long. The Absolute 845 is not only the story of Unison Research, it is a significant piece of audio history in general, forever tied to the world of analog valves. In many ways, the Absolute is still unsurpassed.
The Triode 25, like its predecessor, is a push-pull amplifier that utilizes EL34 tubes in the output stage. The push-pull circuit includes a final stage with two power tubes intended for the amplification of the positive half-waves, respectively, and of the negative half-waves of the audio signal. The task of properly reconstructing the audio signal is then assigned to the output transformer which, thanks to its symmetrical structure, allows for a highly linear signal. Here are some of the more important and significant benefits of a push-pull structure in this type of amplifier design:
– Higher output power
– Higher efficiency and therefore less heat generated, with positive effects on the durability of the output tubes as well as a significant savings in energy costs
– No static polarization of the output transformer, resulting in better performance of this section
To ensure high quality sound in an amplifier with a push-pull configuration, however, it is essential that all individual amplification stages, especially the two semi-output amplifiers, are carefully designed and constructed to prevent the formation of dangerous and compromising odd-order harmonic distortion. This is even truer for the output transformer.
The new Triode amplifier 25 has experienced a long and painstaking design and testing period despite the considerable experience already gained in the construction of its predecessor, the Triode 20. The Triode 25 can operate in two modes: triode and pentode. The latter is capable of delivering a maximum power output of over 45 watts per channel with a load of 6 ohms with harmonic distortion extremely contained across the entire audio band.
Three amplifiers symbolize the success of Unison Research: the Simply Two, the Triode 20 and the legendary Absolute. On the occasion of the 25th anniversary of the birth of Unison Research, we pay homage to these historic devices by offering the Simply Two and the Absolute in a limited and numbered “Anniversary” edition. We’ve also decided to offer a completely new version of the Triode 20 and named it, quite appropriately, the Triode 25.
Output Power: Approx. 45 watt per channel
Approx. 25 watt per channel
Output Impedance: 6 Ohm
Input Impedance: 47 kOhm / 50 pF
Negative feedback: 5 dB or 1.8 dB
Valve complement: 2 x ECC83 (12AX7) 1 x ECC82 (12AU7) 4 x EL34 (6CA7)
Power Consumption: 300 watt max
Fuses: T6.3A from 100V to 130V T3.15A from 220V to 250V
Dimensions: 30 cm x 45 cm x H. 20cm
Net weight : 20 Kg
USB DAC SPECIFICATION
Asynchronous USB interface compliant to USB 2.0 Audio Class
Accepts PCM up to 384kHz and DSD up to 128x
Resolution up to 32 bits
Last generation ESS Sabre DAC with jitter eliminator circuit
Galvanic isolation between USB interface and conversion circuit
Low phase noise clocks which reside in the “clean” supply domain to preserve low jitter performance
110dB SNR (@ 1kHz, “A” weighted, 192kHZ) 0.008% THD+N (@ 1kHz, -3dBFS)
Unison Research’s unrivalled ability with Single-Ended valve designs is well known around the world. The SH is the company’s first headphone amplifier to benefit from such extensive knowledge and ability.
The SH uses a Single-Ended Class A design with only two stages and a passive volume control. The classic refinement of the valves combines with modern technology found in the internal USB DAC to produce something truly stunning.