Unison Research Phono One Valve Phono Stage

Unison Research Phono One Valve Phono Stage

Free UK Delivery


* Required Fields



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. Please remember that postage and packing is completely free for orders over £50*. 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.

Deliveries usually take 1-3 working days. The majority of orders are sent via our couriers'; Interlink Express on a next-day-delivery service. Smaller, low value or light-weight items are normally posted using Royal Mail Recorded or Royal Mail Special Delivery.

Once your product has been dispatched, you will be notified via email and sent a unique consignment number, you can use this number at to check the status of your delivery. If you have provided a mobile telephone number, Interlink's Predict service will notify you by text (and email) of a one-hour delivery window. If the window they suggest is inconvenient, you can change the date of delivery to a later one via text or email.

*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.

Shipping CostsMainland UK (Next-Day)Offshore/Out-of-reach (2-day)Northern Ireland, Channel Islands, Isle of Man, Scottish Islands, Scilly IslandsRepublic of Ireland (2-day)
Under £50 Orders £7.50 £12.50 £15.00
Over £50 Orders FREE £19.99 £29.99
Surcharge Orders £50.00 £69.99 £79.99
Saturday Delivery £12.99 N/A N/A
Sunday Delivery £12.99 N/A N/A


Post codes exempt from the free delivery service include:

Scottish Highlands Post Codes: AB30-38, AB41-42, AB44-56, FK17-99, G83, IV1-28, IV30-39, IV52-54, IV63, KW1-14, PA21-33, PA34-40, PH15-26, PH31-41, PH49-50
Islands Post Codes: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3
Northern Ireland: All BT postcodes
Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25

Press & Awards