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Unison Research Phono One Phono Stage

code: UR-PHONO-ONE
£2,300.00 (FREE UK Delivery)
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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. 

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

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.

Technical Specifications:

  • Type: Pure Class A valve phono stage
  • RIAA: Passive ± 0.1dB (20Hz / 20kHz)
  • Output Impedance: 800Ω
  • Outputs: 1x Line (RCA)
  • Gain: 54dB
  • THD: 0.1% @ 1V output
  • Inputs: 1x 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: 5x ECC83 (12AX7)
  • Power Supply: External
  • Dimensions: 373 x 58.4 x 246.3mm
  • Weight: 3.6kg (incl. PSU)

We endeavour to despatch same day for orders placed up to 12 noon on available stock items (items with stock message "Usually dispatched within 24 hours"). Please remember to check with us first for a physical stock check if next day delivery is important to you. Any items with stock message "Usually dispatched within 72 hours" are items that we do not hold in stock but order in from the importer or manufacturer as soon as a customer order is received. Occasionally these may be delayed beyond 72 hours due to importer/manufacturer stock levels but we will inform you as soon as we can if this is the case.

UK ORDERS:  We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge.  Non Mainland locations - Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer and are not Free of Charge. Smaller items are delivered using Royal Mail recorded delivery or special delivery. Larger items are delivered using a courier service such as Interlink Express, DPD, UPS or DHL. 

INTERNATIONAL ORDERS: We offer competitive rates which can be confirmed by email. Please just ask – we will need a full delivery address and telephone number. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using DPD, DHL or UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Turntableworld or by the courier with a request for any further information required. Customs duties do not apply for shipments into any EU country (for a full list please refer to the EU Country List). Customs duties can apply for countries outside of the EU. Customers in these countries are responsible for all taxes and duties incurred when the items enter their country.

COLLECT IN STORE OR HOME INSTALL:At the request of the manufacturer some items cannot be supplied by mail order but you can click and buy them and then elect to collect them from our store or arrange a home install (if applicable). Applicable items clearly state that they are Collect in store or home install. Once ordered you will receive a message prompting you to contact us by phone or email to arrange for us to deliver and install or to reserve and collect from our store at your convenience, you will also be advised of the delivery time / stock availability as not all Home install / collect in store items are held in stock. 

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