Unison Research Preludio Integrated Valve Amplifier

Unison Research Preludio Integrated Valve Amplifier

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Unison Research Preludio Integrated Valve Amplifier

The Preludio is an integrated valve amplifier and features the same superlative technological philosophies and compelling sound that Unison Research has become renowned for. 

The Preludio uses double triode ECC82 valves to give the unit's pre and power amplification components a truly warm sound, complete with every rich and dynamic detail left intact. Unison Research has worked meticulously on the output stage design, which is based around two high-quality KT88 tubes. Every element of the Preludio has been designed to reflect the quality of sound that Unison Research refuse to compromise on, from the internal circuitry down to the volume knob, premium design and premium sound is at the forefront of this amplifiers design philosophy.

Who is Unison?

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.

 Output Stage  Single Ended Ultraliner A Class
Output Power (per-channel)  14W 
 Output Impedance 6Ω  
 Input Impedance 47kΩ 
 Feedback Factor 10dB 
 Valves  2 x 6550/KT88
2 x ECC82 (12AU7)
Inputs 4 x Line
1 x Tape 
 Outputs 1 x Tape 
1 x Subwoofer 
Frequency Response  15Hz - 50kHz 
 Power Consumption 200W max 
    Dimensions in cm (W x D x H)    37.5 x 40 x 18
Net Weight 18kg

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

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