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Arrow left Unison Research

Unison Research Triode 25 Cherry Valve Stereo Integrated Amplifier

Unison Research

Product Reference

29639

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Condition: New

Brand-new, unused, unopened and undamaged item in original retail packaging (where applicable).

Warranty

Limited 2 year warranty.  More info

Special order

Order now and we'll dispatch as soon as possible.

More Information

£2999.00

The Triode Cherry 25 was born out of the huge success of the long-standing Triode 20 amplifier, and released as part of the 25th anniversary celebrations of Unison Research's formation. It's been developed over an extended period to ensure it is a worthy successor to the Triode 20's name.

Like its predecessor, the Triode 25 is a push-pull amplifier that utilizes EL34 tubes in the output stage. The push-pull circuit includes a final stage with two power tubes intended for the amplification of the audio signal, and is then followed by a symmetrical output transformer stage that reconstructs the signal into a high-quality linear wave.

Using a push-pull structure in this amplifier design allows for numerous benefits, including higher-output power compared to single-ended designs, improved efficiency and no static polarization of the output transformer for greater performance in the output section. However, for this to work well it is essential that all the individual amplification stages are carefully designed and constructed to prevent the formation of dangerous and compromising odd-order harmonic distortion. This is true for the two semi-output amplifiers, and even more important in the output transformer.

The Triode 25 can operate in two modes: triode and pentode. The latter is capable of delivering a maximum power output of over 45 watts per channel (6O load) with minimal harmonic distortion across the entire audio band.

The addition of a USB input modernises the Triode 25 and increases its appeal to the growing world of computer audiophiles, who use their laptop or computer as a high-quality audio source for their hi-fi. The USB input is 32-bit/384kHz and DSD 128 compliant to support the latest standards in studio quality audio.

Key Features:

  • Tick Push-pull integrated valve amplifier
  • Tick 32-bit, DSD-compatible USB input for streaming from a computer
  • Tick Switchable Triode and Pentode modes
  • Tick Premium design throughout
  • Tick Locally sourced materials
  • Tick Based on the long-standing Triode 20 design
  • Tick EL34 tubes in the output stage
  • Tick RC2 remote with black wood finish included
  • Tick Premium Cherry Wood front panel*

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.

Output Stage: Push-Pull, Ultralinear, Class-AB
Output Power (per-channel): 45W in Pentode mode,
25W in Triode mode (approx.)
Output Impedance: 6O
Input Impedance: 47kO / 50pF
Negative Feedback: Switchable, 5dB or 1.8dB
Valves: 2 x ECC83 (12AX7),
1 x ECC82 (12AU7),
4 x EL34 (6CA7)
Power Consumption: 300W max.
Fuses: T3.15A (220 - 250V)
Dimensions (W x D x H): 30 x 45 x 20cm
Net Weight: 20kg

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.

Part Exchange Available

Looking to upgrade and not sure what to do with your old gear? Trade-in with us and take the hassle out of finding a new home for your equipment.

We can take back any type of product we sell, from cables, to projectors, speakers, amplifiers, AV receivers, subwoofers and more.

Just fill in the form below and we'll get back to you.

Please note we don't purchase second hand goods for cash, we take trade-ins as part payment towards the purchase of new equipment.

PayPal Credit - Flexible Credit

Buy Now, Pay Later: Get 4 months 0% finance when you spend £99 or more. Look for the PayPal Credit button when making your purchase.

More information on PayPal Credit is available here.

Klarna Finance - Pay Monthly

Pay monthly plans for up to 48 months, available on purchases between £299 and £25,000.

0% ONIF6 6 Months
0% ONIF12 12 Months
0% ONIF24 24 Months
0% ONIF36 36 Months
0% ONIF48 48 Months

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Deposit variable between 10% and 50%, subject to a minimum loan value of £250.

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Please note: These finance quotes are for a single purchase of the product listed on this page, at the price shown. Adding additional products or quantities to your order, or using any vouchers or other discounts will result in changes to the quotes and available terms.

For further information please visit the finance page.

Stock

This item is special order and will required additional time to dispatch.

Please see our stock information page for more details on how we show stock information on this website.

Delivery

When in stock:

This item is available dispatch Monday to Friday, subject to cut-off times and excluding public holidays. Next working day and weekend deliveries available.

Delivery is available to most addresses within the United Kingdom. Some services may not be available to all postcodes. More information is available at the basket and on our delivery page.

We do not dispatch orders to addresses outside of the United Kingdom.

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