Integrated amplifiers — MasterSound Evo 300B

The Evo 300B is a tube integrated amplifier with phono from MasterSound, sitting above the Duetrenta with comprehensive balanced connectivity and somewhat greater output power. The Evo 300B brings MasterSound's more accomplished current tube-circuit engineering to a complete integrated chassis.

Key specs that matter

One balanced XLR input plus three single-ended RCA inputs and a dedicated phono input are provided - a comprehensive connectivity set. Input impedance is 50k ohms on both connections. Output power is 2 x 50W into 8 ohms, somewhat more than the Duetrenta's 33W, consistent with the classic 300B tube topology referenced in the model name. Frequency response spans 14Hz to 22,000Hz within plus-or-minus 3dB. At 450 x 430 x 270mm and 31kg, the Evo 300B's considerable weight reflects serious output transformer and power-supply componentry typical of quality 300B amplifier designs.

Sound and use context

Expect the rich, harmonically engaging tonal character genuine 300B single-ended triode topology is broadly celebrated for among tube enthusiasts, with the moderate 50W-per-channel output demanding efficient loudspeakers to reach satisfying volumes.

Pairing

The built-in phono input covers a turntable directly, and the moderate 50W output pairs best with efficient, high-sensitivity loudspeakers.

Alternatives

MasterSound's own Duetrenta offers a more modest-output alternative within the same broader tube-integrated catalogue.