We are initially drawn to the presentation’s scale and authority. It sounds huge, with plenty of headroom and the ability to play at furniture rattling levels without any obvious signs of stress.
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Unison Research Unico 150 Integrated Amplifier
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Regular price
$7,499.00
Unit price
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Third-generation owner
Call or text: 410-239-2020Yes, that's literally his cell
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Unison Research Unico 150 Integrated Amplifier
Regular price
$7,499.00
Unit price
The Unison Research Unico 150 is the flagship of the Unico hybrid line, a dual-mono integrated amplifier that runs valves in both the input and driver stages ahead of a Hexfet output, delivering 150 watts per channel into 8 ohms. With zero global feedback, balanced and single-ended inputs, and bi-wire speaker terminals, it brings valve character to the speakers and rooms that need real power.
Key Features of the Unison Research Unico 150
- Flagship dual-mono hybrid: Two ECC83 input valves and two 6H30 driver valves run in Class A ahead of a Hexfet output stage, in a dual-mono layout.
- 150 watts per channel: 150+150W into 8 ohms, rising to 220+220W into 4 ohms for demanding loads.
- Zero global feedback: The Unico 150 runs with no global negative feedback and only 16dB of local feedback, using Unison Research's three-stage circuit.
- Balanced and single-ended inputs: Six line inputs in total, including two balanced XLR pairs and a fixed-gain AV bypass.
- Bi-wire speaker terminals: Two pairs of binding posts per channel for bi-wiring, plus a volume-controlled subwoofer output and a tape loop.
- Built in Italy: Hand-assembled by ARIA with selectable mains voltage, set for US 120V, and supplied with a remote control.
A Three-Stage Valve and Hexfet Circuit
The Unico 150 puts valves where they shape the sound and transistors where they do the heavy lifting. A pair of ECC83 double-triodes handles the input stage and a pair of 6H30 double-triodes runs the driver stage, both in pure Class A totem-pole configuration, before a Class AB Hexfet output stage with four complementary pairs per channel drives the speakers. Unison Research developed two circuit standards, a two-stage version for lower-powered amplifiers and a three-stage version for higher output, and the Unico 150 uses the three-stage circuit.
150 Watts, Dual Mono
Rated at 150 watts per channel into 8 ohms and 220 watts into 4 ohms, the Unico 150 is Unison Research's most powerful amplifier and is built as a dual-mono design, so each channel runs its own amplification with minimal interaction between left and right. That combination of valve front end and high-current Hexfet output is what lets the amplifier hold its composure on large or demanding loudspeakers where smaller hybrids run out of headroom.
Zero Global Feedback
The Unico 150 applies no global negative feedback, relying instead on 16dB of local feedback within the circuit. Designers use global feedback to lower distortion measurements, but many listeners feel it costs the music some life and immediacy. By keeping feedback local, Unison Research aims for a more open and natural presentation, and the amplifier still holds output resistance below 0.4 ohms across the audio band for firm control of the loudspeaker.
Balanced, Single-Ended, and Bypass Inputs
Connectivity covers six line-level inputs: three unbalanced RCA, two balanced XLR pairs, and one unbalanced bypass input that runs at fixed gain for slotting the amplifier into a home-theater system. Outputs include a tape loop and a volume-controlled subwoofer output, and each channel carries two pairs of speaker binding posts for bi-wiring. There is no onboard phono stage, so vinyl listeners add an external phono preamplifier of their choice.
Built in Italy
Unison Research builds the Unico 150 in Italy through its ARIA workshop. At 25kg it is a substantial piece, with a selectable mains transformer so US units arrive set for 120V operation, and it ships with a remote control for volume and source. The result is a flagship integrated that is meant to anchor a serious system for years rather than be replaced in a season.
About Unison Research
Unison 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. The Unico 150 sits at the top of that family. Each Unico model is built in Italy.
Explore the Unison Research Unico Line
The Unico 150 is the flagship of Unison Research's Unico hybrid integrated range, delivering 150 watts per channel for demanding speakers and larger rooms. Just below it, the Unico 90 is a purist line-level design, the Unico Due adds an onboard DAC, the Unico Nuovo steps down in power, and the Unico Primo serves as the entry point.
The Listening Room Difference
We'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.
Unison Research Unico 150 Specifications
| Output power | 150+150W into 8Ω, 220+220W into 4Ω |
| Input stage | Pure Class A, 2 x ECC83 double-triode totem pole |
| Driver stage | Pure Class A, 2 x 6H30 double-triode totem pole |
| Output stage | Class AB Hexfet, 4 complementary pairs per channel |
| Global feedback | 0 dB (16 dB local) |
| Input impedance | 24kOhm // 100pF |
| Input sensitivity | 860mV RMS |
| Output resistance | <0.4Ω, resistive across the audio band |
| Inputs | 6 line (3 unbalanced RCA, 2 balanced XLR, 1 unbalanced bypass) |
| Outputs | 1 tape, 1 volume-controlled subwoofer |
| Speaker terminals | 4 + 4, bi-wiring |
| Power consumption | 550W at maximum output into 8Ω |
| Mains | Selectable voltage; US units set for 120V |
| Dimensions (W x H x D) | 43.5 x 18 x 44 cm |
| Weight | 25 kg |
| Finishes | Silver, Black |
And the depth of field and sheer scale the 150 conjures here are notable. In fact, the scale the 150 can create is among the best I’ve ever heard.
Does the Unison Research Unico 150 have a built-in phono stage?
Does the Unison Research Unico 150 have a built-in phono stage?
No. Unlike the smaller Unico Due, the Unico 150 does not include an onboard phono stage. To play vinyl, add an external phono preamplifier between your turntable and one of the amplifier line inputs. If you would like help choosing one, call or text Mike at 410-239-2020.
Is the Unico 150 set up for US 120V power?
Is the Unico 150 set up for US 120V power?
Yes. The Unico 150 uses a selectable mains transformer, and the units we sell are configured for US 120V operation out of the box, so no step-up transformer or conversion is needed in the United States.
What is the difference between the Unico 150 and the Unico Due?
What is the difference between the Unico 150 and the Unico Due?
The Unico 150 is the flagship: it makes 150 watts per channel, uses a dual-mono layout with valves in both the input and driver stages, and adds balanced XLR inputs, but it has no phono stage or onboard DAC. The Unico Due is smaller at 100 watts per channel and includes both a moving-magnet phono stage and a built-in DAC. Choose the 150 for more power and balanced connectivity, the Due for a built-in phono stage and DAC.
Can the Unico 150 drive difficult or large speakers?
Can the Unico 150 drive difficult or large speakers?
The Unico 150 is built for demanding loads. It delivers 150 watts into 8 ohms and 220 watts into 4 ohms from a dual-mono Hexfet output stage, so it has the current to control larger or lower-impedance speakers that smaller integrated amplifiers struggle with. For specific speaker matching, call or text Mike at 410-239-2020.
What tubes does the Unico 150 use?
What tubes does the Unico 150 use?
The Unico 150 uses four valves: two ECC83 double-triodes in the input stage and two 6H30 double-triodes in the driver stage, all running in Class A. The valves shape the signal at low voltage while the solid-state Hexfet output stage drives the speakers, so the tubes work gently and last a long time.
