A21a

About the A21a

The Sugden A21a Class A integrated amplifier is a compact, elegantly designed unit renowned for its pure Class A single-ended solid-state circuit, which delivers exceptional sound quality free from crossover distortion. It produces 23 to 25 watts per channel into 8 ohms, providing a wide and deep soundstage, impressive dynamics, and powerful bass. The amplifier features optional MM/MC phono input, four to five line-level inputs, pre-out (variable), tape out (fixed), and stereo multi-way binding posts. It includes remote volume control and an earth terminal. The frequency response is 10Hz to 20kHz (+/-0.5 to 1dB), with a bandwidth extending from 6Hz to 200kHz. Signal-to-noise ratio exceeds 83dB, ensuring low noise and high fidelity. The A21a is hand-built in England, compact (92 x 430 x 350 mm), and weighs approximately 11 kg. It is celebrated for its midrange clarity, natural and fatigue-free sound, and durability, with many original units still in use after decades. The amplifier is suitable for driving most bookshelf or efficient larger speakers and is considered a timeless, high-end performance amplifier at an accessible price point.