Every DNA amplifier is a purist class A single ended triode design that needs no feedback, which keeps distortion low and the frequency response flat and extended. The Starlett gives 440mW, enough for easy dynamic headphones from vintage AKGs to Focals. The Supernaut moves to KT66 output tubes and 1.8W, so it drives harder ZMF and Sennheiser dynamics and stays quiet for sensitive headphones. The Stellaris 2A3 adds Duelund CAST capacitors and a second pair of RCA inputs, so two sources stay connected at once.

• Start here. Choose the Starlett if you want a relaxed everyday amplifier for a first tube setup, with the smallest footprint and a gentle price of entry in the range.
• Sweet spot. The Supernaut gives you 1.8W and Audio Note UK output transformers, so you get more power for demanding dynamics and a quieter background for sensitive headphones than the Starlett offers.
• All in. The Stellaris 2A3 extends the Supernaut recipe at the same 1.8W, and its 2A3 power triodes and bespoke transformers bring the greater clarity, resolution and layering the maker describes for listeners wanting the best DNA offers.