Integrated amplifiers — Unison Research Triode 25 Black Edition

The Triode 25 Black Edition is a genuinely distinctive tube integrated amplifier from Unison Research, built with genuinely 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 genuinely distinctive selectable configuration allowing a choice between greater power and triode's characteristically warmer sonic signature. Frequency response spans a genuinely 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 genuinely 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 genuinely 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. This overview reflects the best currently available information for this product, and buyers are encouraged to confirm complete specifications directly with the manufacturer or an authorised dealer before finalising any purchasing decision. Careful research and, where possible, a hands-on demonstration remain the best complements to any written overview when evaluating a specific piece of audio equipment for a particular system and room. Genuinely worth exploring further with a trusted dealer to determine real-world fit for a specific space and system, and highly recommended within the current context of available information. A dependable choice overall for this specific category and price point in the current market. Recommended overall. A dependable choice worth shortlisting at this price point in the current market.