{"product_id":"unison-research-unico-90-stereo-tube-hybrid-integrated-amplifier","title":"Unison Research Unico 90 Stereo Tube Hybrid Integrated Amplifier","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Unison Research Unico 90 is a dual-mono hybrid integrated amplifier that runs a pure Class A valve stage into a Hexfet output, delivering 100 watts per channel into 8 ohms with zero global feedback. Sitting just below the flagship Unico 150, it pairs valve musicality with the grip and reliability of MOSFET power in a purist, line-level design built in Italy.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eKey Features of the Unison Research Unico 90\u003c\/span\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003ePure Class A valve stage:\u003c\/strong\u003e Six valves, two ECC83 and four ECC81 (three per channel), run the input and driver work in pure Class A before the output stage.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eHexfet MOSFET output:\u003c\/strong\u003e A Class AB output stage with three complementary Hexfet pairs per channel delivers 100 watts into 8 ohms and 160 watts into 4 ohms.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eZero global feedback:\u003c\/strong\u003e The two-stage circuit uses local feedback only, with no global negative feedback, for a more open and immediate presentation.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eDual-mono construction:\u003c\/strong\u003e Left and right channels are built as mirror images for low crosstalk and strong stereo separation.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eBalanced and single-ended inputs:\u003c\/strong\u003e Six line inputs in total, including two transformer-coupled balanced XLR pairs and a fixed-gain bypass input.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eBuilt in Italy:\u003c\/strong\u003e Hand-assembled by ARIA with audiophile-grade capacitors, multi-voltage operation set for US 120V, and a remote control.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eA Pure Class A Valve Stage and Hexfet Output\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Unico 90 runs valves where they shape the sound and MOSFETs where they drive the speakers. Its input and driver work is handled in a single pure Class A stage built from an ECC83 double-triode totem pole with a parallel ECC81 totem pole, which amplifies the signal and drives the power stage directly. From there a Class AB Hexfet output stage with three complementary pairs per channel takes over. The result is the warmth and texture of valves with the control and reliability of solid-state power.\u003c\/span\u003e\u003c\/p\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/unico-90-components-macro-ls.jpg?v=1780915234\" alt=\"Unison Research Unico 90 circuit board close-up with valve socket and audiophile capacitors\" style=\"width:100%;max-width:1000px;height:auto;border-radius:12px;margin:16px 0;\"\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003e100 Watts, Dual Mono, Zero Global Feedback\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eRated at 100 watts per channel into 8 ohms and 160 watts into 4 ohms, the Unico 90 is built as a dual-mono design, so each channel runs its own amplification for low crosstalk and strong stereo imaging. It applies no global negative feedback, using only local feedback within the two-stage circuit, an approach that many listeners feel keeps the music more open and alive. Output resistance stays below 0.4 ohms across the audio band, so the amplifier keeps firm control of the loudspeaker.\u003c\/span\u003e\u003c\/p\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/unico-90-dual-mono-layout-ls.jpg?v=1780915237\" alt=\"Unison Research Unico 90 dual-mono internal layout from above\" style=\"width:100%;max-width:1000px;height:auto;border-radius:12px;margin:16px 0;\"\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eAudiophile-Grade Components\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eOpen the Unico 90 and the parts count tells the story: WIMA film capacitors through the signal path and Mundorf M-Cap polypropylene capacitors at key positions, mounted on a tidy dual-mono board. These are the kinds of components usually reserved for separates at higher prices, and they are a large part of why the amplifier sounds the way it does.\u003c\/span\u003e\u003c\/p\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/unico-90-mundorf-capacitors-ls.jpg?v=1780915240\" alt=\"Unison Research Unico 90 board with Mundorf M-Cap polypropylene capacitors\" style=\"width:100%;max-width:1000px;height:auto;border-radius:12px;margin:16px 0;\"\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eBalanced, Single-Ended, and Bypass Inputs\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eConnectivity runs to six line-level inputs: three unbalanced RCA, two transformer-coupled balanced XLR pairs, and one unbalanced bypass input. The bypass runs at fixed gain, so the Unico 90 can act as a power amplifier or drop into a home-theater system with the preamp section out of the path. Outputs include a tape loop and a volume-controlled subwoofer output, and each channel offers two pairs of binding posts for bi-wiring. There is no onboard phono stage, so vinyl listeners add an external phono preamplifier.\u003c\/span\u003e\u003c\/p\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/unico-90-rear-panel.jpg?v=1780914935\" alt=\"Unison Research Unico 90 rear panel with RCA and XLR inputs, bi-wire terminals, and voltage selector\" style=\"width:100%;max-width:1000px;height:auto;border-radius:12px;margin:16px 0;\"\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eBuilt in Italy\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eUnison Research builds the Unico 90 in Italy through its ARIA workshop. At 20kg it is a serious piece of engineering, finished with a three-piece machined aluminum front panel in silver or black and a selectable mains transformer that ships set for US 120V operation. A remote control handles volume, and the soft-start circuit mutes the outputs briefly at power-on.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eAbout Unison Research\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eUnison Research is an Italian manufacturer known for valve and hybrid amplifiers that put music first. The Unico line is its hybrid family, combining valve preamplification with solid-state output stages to make the valve sound practical for everyday systems and a wide range of loudspeakers. Each Unico model is built in Italy.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eExplore the Unison Research Unico Line\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Unico 90 sits near the top of Unison Research's Unico hybrid integrated range, just below the flagship. The \u003ca href=\"\/products\/unison-research-unico-primo-integrated-amplifier\"\u003eUnico Primo\u003c\/a\u003e is the entry point, with the \u003ca href=\"\/products\/unison-research-unico-nuovo-integrated-amplifier\"\u003eUnico Nuovo\u003c\/a\u003e stepping up from there. Above the 90, the \u003ca href=\"\/products\/unison-research-unico-150-integrated-amplifier\"\u003eUnico 150\u003c\/a\u003e uses a three-stage circuit for 150 watts per channel and the largest rooms.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eThe Listening Room Difference\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWe're a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on exceptional service and relentless passion for hifi. Whether you're visiting in person or ordering online, we bring decades of experience, personalized service, and honest guidance to every interaction. We don't just ship boxes. We help build systems, answer your questions like real humans, and make sure every detail of your setup is right, from the cables to the final connection. Our passion is helping you get the most out of your gear, with support that lasts well beyond the sale.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 dir=\"ltr\"\u003e\u003cspan\u003eUnison Research Unico 90 Specifications\u003c\/span\u003e\u003c\/h5\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:34%;background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eOutput power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width:66%;padding:12px;\"\u003e100+100W into 8Ω, 160+160W into 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eValves\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e2 x ECC83, 4 x ECC81 (three per channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eInput\/driver stage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003ePure Class A, ECC83 totem pole with parallel ECC81 totem pole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eOutput stage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003eClass AB Hexfet, 3 complementary pairs per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eCircuit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003eTwo-stage, zero global feedback (local feedback only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eTHD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e\u0026lt;0.15% @ 1kHz, 1W; \u0026lt;0.5% @ 1kHz, 10W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eInput impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e21kOhm \/\/ 300pF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eInput sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e860mV RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eOutput resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e\u0026lt;0.4Ω, resistive across the audio band\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e6 line (3 unbalanced RCA, 2 balanced XLR, 1 unbalanced bypass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eOutputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e1 tape, 1 volume-controlled subwoofer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eSpeaker terminals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e4 + 4, bi-wiring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003ePower consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e550W at maximum output into 8Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eMains\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003eSelectable voltage; US units set for 120V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eDimensions (W x D x H)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e43.5 x 44 x 18 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003e20 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f3f3f3;padding:12px;\"\u003e\u003cstrong\u003eFinishes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:12px;\"\u003eSilver, Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Unison Research","offers":[{"title":"Silver","offer_id":67848938750321,"sku":"URU90","price":3659.39,"currency_code":"USD","in_stock":true},{"title":"Black - Special Order","offer_id":67848938783089,"sku":"URU90BLK","price":3659.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0923\/5215\/1921\/files\/UNICO_90_SILVER-1_a7917a3b-f1b8-4f23-94bc-f13edf18513d.jpg?v=1792519754","url":"https:\/\/sliyden.store\/products\/unison-research-unico-90-stereo-tube-hybrid-integrated-amplifier","provider":"sliyden.store","version":"1.0","type":"link"}