Unison Research Phono One Valve Phono Stage

Unison Research Phono One Valve Phono Stage

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Unison Research Phono One Valve Phono Stage

Phono One was for many years one of the most appreciated models in the Unison Research Catalogue. It has now been completely renewed and improved, although its look of elegant and timeless simplicity remains the same.

An all-tube design with elastic suspension, it uses five ECC83 double triode valves in a parallel configuration to give excellent low noise and distortion characteristics. Cross-talk also is extremely low at -90dB. Overall gain is 54dB, and switchable resistance and capacitance loading make it suitable for all MM and most MC cartridges.

The sound is pure, with supreme natural detail and great clarity. Truly a top class phono stage.

Who is Unison Research?

Unison Research, founded in 1987 by a group of audiophile technicians, is a prestigious Italian manufacturer of valve-based premium high fidelity audio components. Specialising in the design and construction of amplifiers, CD players, headphone amps and phono stages that boast not only impeccable, effortlessly rich sound but also an artistic visual design.

Type Pure Class A
valve phono stage
RIAA Passive ± 0.1dB
(20Hz / 20kHz)
Output Impedance 800Ω
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 47kΩ (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)

Pure Class A valve phono stage


Providing your item is in stock, the order is usually dispatched within 24 hours. Postage and packing is completely free for orders over £100*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.


Orders are sent via our couriers' DPD on a next-day-delivery service and usually, take between 1 and 3 days. 


Please use this link to find more detailed delivery information.


*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however, delivery to these locations will incur a charge and can only be sent via a 2-day service.

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