Integrated amplifiers — Trafomatic Audio Evolution Two

The Evolution Two is a distinctive single-ended-triode tube integrated amplifier from Trafomatic Audio, built with a minimal power output characteristic of purist SET topology. The Evolution Two brings Trafomatic's considered engineering to a purist single-ended-triode integrated amplification format.

Key specs that matter

Four single-ended inputs are provided. Input sensitivity is 500mV, with input impedance at a substantial 100,000 ohms single-ended. Output power is a minimal 2 x 8W into 8 ohms - a classic single-ended-triode figure. Frequency response spans 10Hz to 60,000Hz within plus-or-minus 3dB. Signal-to-noise ratio is 75dB, with total harmonic distortion plus noise at a characteristic 0.55% for purist single-ended-triode topology. At 450 x 320 x 215mm and 22kg, the Evolution Two's considerable weight for its minimal power output reflects serious internal transformer engineering consistent with quality single-ended-triode design.

Sound and use context

Expect the exceptionally rich, harmonically resonant character single-ended-triode amplification is broadly celebrated for, with the minimal 2 x 8W output requiring high-efficiency loudspeakers.

Pairing

The minimal 2 x 8W output requires high-efficiency loudspeakers, typically horn-loaded or high-sensitivity designs exceeding 95dB.

Alternatives

Trafomatic's own Elegance Evolution offers a considerably more powerful push-pull alternative within the same broader catalogue.