Introduced in 1967, the A21 was the world's first production Class A transistor amplifier, designed by British pioneer James Sugden. His legacy shines through the remarkable Signature A21 integrated. With incredible attention to fit and finish, the Signature A21 delivers a solid tactile experience that exudes quality. This piece has clarity unmatched at this price point, with pure Class A performance that feels like twice the output it's rated for. It's bloody brilliant.

SPECS

Type   Class A solid-state stereo integrated amplifier

Power Output   25 Watts into 8Ω

Frequency Response   ±1dB 10Hz-20kHz

Signal to Noise   >83dB

Signal to Noise   >83dB

Line Input Sensitivity   170mV for max. out

Phono Input Sensitivity   3mV/mm, 0.2mV/mc for max. output

Phono Loading   MM 47K MC 470 Ohm

Bandwidth   6Hz-200kHz

Weight   24.25 lbs.

Dimensions   3.62"W x 16.93"H x 13.78"D

LINER NOTES

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 A21’s 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 A21 is an amplifier you can listen to for hours without fatigue. The single ended voltage rail circuit provides impressive dynamics and incredible bass.