Sugden A21 Signature

Sugden A21 Signature

The first commercial Sugden amplifier was the A21 in the mid-1960s. It is widely recognized as the first commercial, solid state, pure class A amplifier available to enthusiasts. It was a very special amplifier with a single-ended class A output configuration and with current feedback. This concept was not generally included in commercial audio amplifiers until more than a decade later.

Being able to recreate a musical performance in an innovative way made the name of Sugden synonymous with musical performance. The true potential of the output configuration was realized in the 1980s when it was paired with modern components, reduced internal filtering, and multi-emitter solid-state output devices.

The Sugden A21 Signature pure class ‘A’ design offers affordable high-end performance from a beautifully designed single-box integrated amplifier. Compact in size with a simple yet stylish design, the A21 Signature might be the only amplifier you’ll ever need. With many of the original A21s still in daily use after fifty years, it could also last a lifetime.

• Specifications

Inputs Five line levels (four on A21 Integrated)

Optional mm/mc phono (price €300,-)

Outputs A pair of stereo multi-way terminals

Pre-out (variable), tape out (fixed)

Remote control Volume up/down

Ground clamp

Specifications Sugden A21 Signature

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

Output power 23 Watts at 8 Ohms

Frequency response +/-1dB 10Hz-20kHz

Bandwidth 6Hz-200kHz

Signal-to-noise ratio >83dB

Gross weight (packed) 11 kg

Dimensions 92 x 430 x 350 mm (hwd)

Available in 3 different colors

For more Sugden Audio models, visit our page: https://hifiboutique.eu/sugden-audio/ 

More information and technical specifications can be found on Sugden’s page. https://www.sugdenaudio.com/