Integrated amplifiers — Sugden Audio A21

The A21 is an integrated amplifier from Sugden Audio, a well-established British manufacturer known for distinctive Class A amplifier engineering, built with comprehensive five-input connectivity. The A21 brings Sugden's most storied engineering heritage to a complete integrated chassis.

Key specs that matter

Four single-ended inputs plus a dedicated phono input are provided. Input sensitivity is 170mV. Output power is a modest 25W into 8 ohms - a figure consistent with genuine Class A operation, which trades raw output for exceptionally linear, low-distortion performance across the entire signal path. Frequency response spans 10Hz to 20,000Hz within plus-or-minus 3dB. Signal-to-noise ratio exceeds 83dB. At 92 x 430 x 350mm and 11kg, the A21's considerable weight relative to its modest output reflects the substantial heat-sinking and power-supply componentry genuine Class A operation demands.

Sound and use context

Expect the exceptionally smooth, linear character genuine Class A amplifier operation is broadly celebrated for, with the modest 25W output demanding efficient loudspeakers to reach satisfying volumes, consistent with Sugden's storied Class A engineering heritage.

Pairing

The built-in phono input covers a turntable directly, and the modest 25W Class A output pairs best with efficient, high-sensitivity loudspeakers.

Alternatives

Sugden's broader amplifier catalogue offers alternatives for buyers wanting a different output level within the same storied Class A engineering philosophy.