Sugden A21A21 Signature Line and Integrated Amplifier The Sugden pure class A design provides affordable high end performance from a beautifully engineered single box integrated amplifier. Compact in size with a simple but stylish design, the A21 is possibly the only amplifier you will ever need. With many of the original A21s still in daily use after fifty years, it could also last a life time. Providing a large soundstage and depth to all types of music, the