Se Evo is a single-ended pure-Class-A valve power amplifier built around a direct-heated output triode and zero global feedback. NAT keeps the gain structure deliberately simple, using a short signal path and custom output magnetics to preserve the character and immediacy of the triode stage.

The amplifier’s power supply uses substantial filtering and energy storage, with soft-start protection to reduce electrical stress during switch-on. High-quality internal wiring, laboratory-grade speaker terminals and selected passive components support the hand-wired construction.

Separate output taps allow the amplifier to be matched to different loudspeaker loads. The heavy modular chassis and protective valve cage provide mechanical stability and safe everyday operation.