Integrated amplifiers — Unison Research Triode 25 Black Edition

The Triode 25 Black Edition is a distinctive tube integrated amplifier from Unison Research, built with selectable pentode and triode operating modes. The Triode 25 Black Edition brings Unison Research's most storied engineering heritage to a substantial tube integrated chassis with genuine sonic-character flexibility.

Key specs that matter

Three single-ended inputs are provided. Output power is 2 x 50W in pentode/ultralinear mode or 2 x 30W in triode mode - a distinctive selectable configuration allowing a choice between greater power and triode's characteristically warmer sonic signature. Frequency response spans a wide 10Hz to 50,000Hz within plus-or-minus 3dB. At 300 x 450 x 200mm and 20kg, the Triode 25 Black Edition represents a substantial commitment reflecting Unison Research's most storied tube-informed engineering heritage.

Sound and use context

Expect the warm, richly textured character tube amplification is broadly celebrated for, with the distinctive pentode/triode selectability offering the listener a choice between greater power and a more characterful triode signature.

Pairing

The selectable pentode/triode operation lets the listener choose the sonic character to match different loudspeakers or moods.

Alternatives

Unison Research's own UNICO 90 offers a more accessible solid-state hybrid alternative within the same broader integrated amplifier catalogue.