Unico 90
$5,499.00 *Price subject to changeOverview
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.
Tech Specs
| Output power | 100+100 W RMS at 8Ω / 160+160 W RMS at 4Ω |
| Frequency response | -1dB @ 12Hz and 45kHz -3 dB |
| Input impedance | 21Kohm // 300pF |
| Input sensitivity | 860mV RMS |
| Input stage | Pure A class, double triode totem pole ECC83 and parallel totem pole ECC81. This single stage, due to the particular circuitry, is able to amplify the input signal and drive directly the power stage. |
| Output stage | Class AB thermostable, complementary Hexfet (3 pairs for channel) |
| Number of stages | 2. This amplifier, due to the particular circuitry, is realized by only two stages: input stage and output stage, and uses only local feedback. |
| Input | 6 line (3 unbalanced, 2 balanced, 1 “bypass” unbalanced) |
| Line Outputs | 1 tape, 1 sub (volume controlled) |
| Output connectors | 4 + 4 bi-wiring |
| Global Feedback factor | 0 dB |
| THD | < 0.15% @ 1kHz, 1 W < 0.5% @ 1kHz, 10 W |
| Output resistance | <0.4 ohm, resistive on all audio frequencies |
| Power Consumption | 550 W (at max power on 8 ohm) |
| Dimensions | 43.5 cm x 44 cm x 18 cm (h) |
| Net weight | 20 kg |
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. 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. 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.
View all products by Unison Research