Unison Research Unico Secondo Phono Integrated Amp


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The Unico Secondo exemplifies the outstanding level of knowledge and experience that Italian hifi manufacturers Unison Research have to offer, specifically in designing and constructing audiophile grade hybrid amplifiers. Based on the success of its predecessors, the Unico Secondo features some similarities with other Unison Research models, while additional and newly developed features and functions allow the unit to sit in its own league.

One such improvement is the upgraded power supply circuits, with an additional secondary winding in the power supply transformer. This means that power dissipation is reduced, while the overall reliability of the amplifier is increased. The pre-amplification section, as well as the driver stages, are based on the technology designs used in the revered Unico SE and Unico 200 models, although they have been developed and enhanced further before being placed into the Unico Secondo. 

The Unico Secondo uses two high-quality ECC83 (12AX7) valves to bring the iconic Unison Research tube sound to the performance, resulting in a truly warm and musically engaging sonic experience. 

RCA inputs, as well as a balanced XLR input are catered for on the rear panel, as well as an MM/MC phono input meaning that both higher end source components and turntables are directly compatible with the Unico Secondo, without the need for an external phono stage. A Tape Output and low-impedance Subwoofer out means integrating a headphone amplifier or expanding your system into a 2.1 channel set-up is done with ease and without compromising on quality. 


Output Power  100W RMS (8Ω)
200W RMS (4Ω) 
Frequency Response   Flat @ 10Hz
-0.5dB @ 100kHz
 Input Impedance 50kΩ // 47pF 
 Input Sensitivity 375mV 
 Input Stage Pure Class A Double Tube 
 Valves  2 x ECC83 (12AX7)
 Output Stage Dynamic Class A
Complimentary pair double power MOSFET 
 Inputs 4 x Line (RCA)
1 x Line (VLR)
1 x Phono (MM / MC) 
Line Output  1 x Tape
1 x Subwoofer (volume controlled) 
 Speaker Outputs  4 + 4 Bi-wiring
 Damping Factor  > 50 (8Ω)
Feedback Factor 8dB
THD < 0.5% @ 1kHz (100W / 8Ω)
Power Consumption 400W (max.)
Dimensions in mm (Width x Depth x Height) 435 x 430 x 130
Weight 15kg

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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 http://www.interlinkexpress.com 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
Saturday by 12 Delivery £35 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
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Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25