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Unison Research Unico 90 Integrated Amplifier


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Ex VAT: 2999.17

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Condition:Brand new in original retail packaging

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Warranty length 2 Years
Brand Unison Research

Tech Specs

Output: 100+100 W RMS su 8Ω
4Ω Output: 160+160 W RMS su 4Ω
Freq resp: -1dB @12Hz, 45kHz -3dB
Input impedance: 21Kohm // 300pF
Input sensitivity: 860mV RMS
Stage: Pure A class, double triode
Totem pole: ECC83 + parallel ECC81
Output stage: Class AB thermostable
Complementary: Hexfet (3 pairs ch)
Number of stage: 2
Line In: 3UnB, 2Bal, “bypass” UnBal
Line Out: Tape, sub (vol controlled)
Output connectors: 4 + 4 bi-wiring
Global Feedback factor: 0dB
THD @1kHz: <0.15% 1W, <0.5% 10W
Output resistance: <0.4Ω
Power Consumption: 550W (max @8Ω)
Dimensions (WDH) : 435 x 440 x 180mm
Net weight: 20 kg

Product Description

Unico 90 Integrated Amplifier is the most valve-like of the Unico valve/solid state ‘hybrid’ series by the stylish Italian valve amp specialists; Unison Research.


Featuring double triode totem pole ECC 83 and one parallel totem pole ECC81 triode valves per channel in the input stage and using high-quality German Mundorf components, Unico 90 has a unique circuit delivering 160W per channel.


This single stage due to the particular circuitry is able to amplify the input signal and directly drive the power stage. This amplifier has two stages, input stage and output stage and uses only local feedback.

Hybrid Amp

Unico 90 is a class A 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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