Unison Research · Integrated Amplifiers
Unico 90
Unico 90 is a hybrid Class AB amplifier with ECC83 and ECC81 valves, zero global feedback, XLR inputs, and bi-wiring outputs.
fig. 01 · integrated amplifiers
Unico 90
From Unison Research
Unico 90 uses a 2-stage hybrid circuit with the gain set by ECC83 and ECC81 valve stages and power delivered by a Hexfet output section. It has RCA and XLR line inputs, a bypass input, tape and subwoofer outputs, bi-wiring speaker terminals, and local feedback only.
Specifications
| Output power | 100+100 W RMS on 8Ω / 160+160 W RMS on 4Ω |
|---|---|
| Valves | 2X ECC83, 4X ECC81 |
| Output stage | Class AB thermostable, 6X Hexfet |
| 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. |
| Number of stages | 2, This amplifier due to the particular circuitry is realized by only two stages: input stage and output stage, and use only local feedback |
| Inputs | 6 line (3 RCA, 2 XLR, 1 "bypass" RCA) |
| Line outputs | 1 tape, 1 sub (volume controlled) |
| Frequency response | -1dB @ 12Hz e 45kHz -3 dB |
| Input impedance | 21Kohm // 300pF |
| Input sensitivity | 860mV RMS |
| 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 | 43.5cm x 44 cm x 18 cm h |
| Weight | 20 kg |
| Product type | hybrid integrated amplifier |
| Series | Unico |