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Unison Research Triode 25 DAC Integrated Valve Amplifier

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From £2,600.00 (FREE UK Delivery)
Item out of Stock  |  Usually dispatched within 24 hours
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The Triode 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 (6Ω load) with minimal harmonic distortion across the entire audio band.

With the use of an Apple lightning to USB connector (not included) you can plug your iPhone/iPod/iPad directly into the Triode 25's DAC and play your hi-res music files straight from your device.

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.

Features:

  • Push-pull integrated valve amplifier
  • 32-bit, DSD-compatible USB input for streaming from a computer
  • Switchable Triode and Pentode modes
  • Premium design throughout
  • Locally sourced materials
  • Based on the long-standing Triode 20 design
  • EL34 tubes in the output stage
  • RC2 remote with black wood finish included
  • Connect iPad/iPod/iPhone directly via Lightning to USB cable (not included)
  • Premium Cherry Wood or Black front panel

Technical Specification:

  • Output Stage: Push-Pull, Ultralinear, Class-AB
  • Output Power (per-channel): 45W in Pentode mode / 25W in Triode mode (approx.)
  • Output Impedance: 6Ω 
  • Input Impedance: 47kΩ / 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

We endeavour to despatch same day for orders placed up to 2pm 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 recieved. 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. 

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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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