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Unison Research Phono One | Phono Stage | Audio Emotion
Unison Research Phono One | Phono Stage | Audio Emotion
Unison Research Phono One | Phono Stage | Audio Emotion

Product Description

Phono One

The Phono One was originally released many years ago and enjoyed much admiration and acclaim during its life-span. After it was discontinued it's popularity did not cease, so when the vinyl hi-fi market began to experience a resurgence, Unison Research decided to re-introduce their iconic phono stage with new and improved specifications.

The new Phono One is aesthetically similar to the original, and while it shares some similarities in circuitry with the Simply Phono it earns its place as Unison Research's flagship phono stage in part because of the 10 triodes it uses (5 x ECC83 (12AX7) valves).

All of the gain stages now implement a parallel configuration for the best low-noise and low-distortion performance. This solution also increases the overall cartridge gain ability to approximately 54dB; easily enough for a wide variety of Moving Magnet (MM) and Moving Coil (MC) cartridges. The same passive RIAA network as found in the original Phono One has been adopted, but with specially selected components that ensure strict tolerances to the equalization curve.

A delayed muting function is built into the phono stage to avoid potential problems with DC voltages and 'bump' (or 'pops') during warm-up and switch-off; this also means you won't hear any music until the valves are running at their optimum temperature, so the sound performance is always the best it can be.

As opposed to the Simply Phono, where only the resistive component of input impedance is changeable, the Phono One can have both the resistance and the capacitance changed to perfectly match the requirements of your chosen cartridge.

Particular care has been dedicated to the power supply design in order to minimise cross-talk and inter-stage interference. Combine this with the elastic suspension of the amplifier board and optimised circuitry throughout, and the result is a superlative sonic performance, full of natural detail and musical clarity.

Key Features

  • Iconic phono stage with classic aesthetic design
  • 5 x ECC83 (12AX7) valves
  • Pure Class A design
  • Stunning sound performance
  • Suitable for all high-end hi-fi systems
  • Switchable Impedance and Capacitance
  • Delayed muting function to avoid sound 'spikes' during start-up and switch-off
  • High-quality Cherry Wood panels*

Technical Data:

Type: Pure Class A valve phono stage
RIAA: Passive ± 0.1dB (20Hz / 20kHz)
Output Impedance: 800
Outputs: 1 x Line (RCA)
Gain: 54dB
THD: 0.1% @ 1V output
Inputs: 1 x RCA (for MM or MC)
Input Impedance: 22, 50, 100 or 47k (switchable)
Input Capacitance: 100, 200, 320 or 420pF (switchable)
Feedback Factor: 0dB
Valves: 5 x ECC83 (12AX7)
Power Supply: External
Dimensions (W x H x D): 373 x 58.4 x 246.3mm
Net Weight: 3.6kg (incl. PSU)

Manufacturer site

Specifications

Product Type
Phonostage
Brand
Unison Research
Condition
New

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Phono One

The Phono One was originally released many years ago and enjoyed much admiration and acclaim during its life-span. After it was discontinued it's popularity did not cease, so when the vinyl hi-fi market began to experience a resurgence, Unison Research decided to re-introduce their iconic phono stage with new and improved specifications.

The new Phono One is aesthetically similar to the original, and while it shares some similarities in circuitry with the Simply Phono it earns its place as Unison Research's flagship phono stage in part because of the 10 triodes it uses (5 x ECC83 (12AX7) valves).

All of the gain stages now implement a parallel configuration for the best low-noise and low-distortion performance. This solution also increases the overall cartridge gain ability to approximately 54dB; easily enough for a wide variety of Moving Magnet (MM) and Moving Coil (MC) cartridges. The same passive RIAA network as found in the original Phono One has been adopted, but with specially selected components that ensure strict tolerances to the equalization curve.

A delayed muting function is built into the phono stage to avoid potential problems with DC voltages and 'bump' (or 'pops') during warm-up and switch-off; this also means you won't hear any music until the valves are running at their optimum temperature, so the sound performance is always the best it can be.

As opposed to the Simply Phono, where only the resistive component of input impedance is changeable, the Phono One can have both the resistance and the capacitance changed to perfectly match the requirements of your chosen cartridge.

Particular care has been dedicated to the power supply design in order to minimise cross-talk and inter-stage interference. Combine this with the elastic suspension of the amplifier board and optimised circuitry throughout, and the result is a superlative sonic performance, full of natural detail and musical clarity.

Key Features

  • Iconic phono stage with classic aesthetic design
  • 5 x ECC83 (12AX7) valves
  • Pure Class A design
  • Stunning sound performance
  • Suitable for all high-end hi-fi systems
  • Switchable Impedance and Capacitance
  • Delayed muting function to avoid sound 'spikes' during start-up and switch-off
  • High-quality Cherry Wood panels*

Technical Data:

Type: Pure Class A valve phono stage
RIAA: Passive ± 0.1dB (20Hz / 20kHz)
Output Impedance: 800
Outputs: 1 x Line (RCA)
Gain: 54dB
THD: 0.1% @ 1V output
Inputs: 1 x RCA (for MM or MC)
Input Impedance: 22, 50, 100 or 47k (switchable)
Input Capacitance: 100, 200, 320 or 420pF (switchable)
Feedback Factor: 0dB
Valves: 5 x ECC83 (12AX7)
Power Supply: External
Dimensions (W x H x D): 373 x 58.4 x 246.3mm
Net Weight: 3.6kg (incl. PSU)

Manufacturer site
No reviews left yet
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Unison Research logo

About the brand

Unison Research was founded in 1987 by a group of passionate audiophiles led by Giovanni Maria Sacchetti. Born in 1945, Giovanni Maria Sacchetti devoted himself at an early age to the study and design of hi-fi systems, combining his interest in electronics with a passion for music inherited from his father, an expert pianist. After completing his studies in electronics, he devoted twenty-five years to teaching while at the same time designing and developing amplifiers for Unison Research.

The first integrated amplifier he designed for Unison Research was the TRIODE20. Its successor, the SIMPLY TWO, was a key step forward in the company’s history—this legendary amplifier was instrumental in achieving great international success for Unison Research in a relatively short time.

Our experience has increased over the years, along with our continuing research of high performance and high quality standards. This has led Unison Research to both historical achievements and great value when it comes to the development of our products. Best of all, we have achieved this through a completely Italian operation…from design to production.

Unison Research is now recognized as the Italian leader in the production of tube amplifiers, and among the top ten in Europe.

Website

www.unisonresearch.com

Delivery Information

Delivery is free for all orders over £250.

'In Stock' items ordered before 1pm will be dispatched the same day.

We use DPD Local 'Next Day Service' for most UK deliveries. Orders sent via 'DPD Local - Next Day Service' will be fully tracked with a 1-hour delivery timeslot on the day of delivery. Standard delivery is Monday to Friday.

Saturday delivery can be selected at checkout for £19.95.

Small items and LP's may be sent using Royal Mail.

Large/heavy items may be sent using TNT Express.

For all other countries please visit the 'Delivery Information' link in the footer.

Occasionally, due to stock demand, we can sell out. If this occurs when you make a purchase, we will inform you quickly. Most out of stock items are available for dispatch within 3 working days. If your purchase is urgent, please contact us to check availability.

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Unison Research Phono One

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