Triode25 with Cover

Unison Research Triode 25

Description

Three amplifiers symbolize the success of Unison Research: the Simply Two, the Triode 20 and the legendary Absolute. On the occasion of the 25th anniversary of the birth of Unison Research, we pay homage to these historic devices by offering the Simply Two and the Absolute in a limited and numbered “Anniversary” edition. We’ve also decided to offer a completely new version of the Triode 20 and named it, quite appropriately, the Triode 25.

The new Triode amplifier 25 has experienced a long and painstaking design and testing period despite the considerable experience already gained in the construction of its predecessor, the Triode 20. 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 with a load of 6 ohms with harmonic distortion extremely contained across the entire audio band.

The Unison Research Triode 25 is widely regarded by reviewers as a “sonic bargain” that balances traditional tube warmth with modern versatility. It is celebrated for its ability to switch between Triode and Pentode modes, allowing you to prioritize either delicate refinement or dynamic power depending on your music and speakers.
Triode Mode:Offers a more “beguiling” and graceful presentation, typically producing around 25W per channel.
Pentode (Ultralinear) Mode: Increases output to approximately 45W per channel, providing the “grip” and bass punch needed for more demanding rock or electronic tracks.
  • Output Stage: Push-pull, ultralinear, Class-AB
  • Output Power: 45 watt Pentode mode 25 watt  Triode mode
  • Output Impedance: 6 Ohm
  • Input: 4 Linea ( 1 Tape ) , 1 USB DAC
  • Input Impedance: 47 kOhm / 50 pF
  • Output: 1 Tape out, 1 Sub Out RCA stereo
  • Negative feedback: 5 dB or 1.8 dB
  • Bias adjustable
  • Valve complement: 2 x ECC83, 1 x ECC82, 4 x EL34
  • Power Consumption: 300 watt max

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