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contributing to the speaker's 6-ohm nominal impedance
allowing direct connection of any moving magnet turntable via the PHONO RCA input and earth terminal on the rear panel
impedance correction circuitry removed due to improved driver linearity in the Contour i generation
Unison Research Unico 90 Hybrid Integrated Stereo Amplifier Color:Black Contact the Vinyl Sound teamUnison Research Unico 90 Hybrid Integrated Stereo Amplifier at Vinyl Sound Buffalo, NY USA The Unico 90 is a Class AB hybrid integrated stereo amplifier from Unison Research (Treviso, Italy), available at Vinyl Sound in Buffalo, NY, USA. A zero global feedback design using only two gain stages an ECC83 and ECC81 totem pole tube input stage driving a complementary MOSFET Hexfet output stage directly the Unico 90 achieves what Unison Research describes