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Integrated amplifiers — Sugden Audio A21SE
Description, images, technical data and specifications
Sugden Audio A21SE
Image source — © Sugden Audio
The A21SE is an integrated amplifier from Sugden Audio, a well-established British manufacturer known for storied Class A amplifier engineering, built with an exceptionally wide top-end extension. The A21SE brings Sugden's most storied engineering heritage to a substantial integrated chassis.
Key specs that matter
Five single-ended inputs are provided. Input sensitivity is 110mV. Output power is a modest 30W into 8 ohms, rising to 40W into 4 ohms - a classic figure reflecting the design's storied Class A operating philosophy. Frequency response spans an exceptionally wide 12Hz to 141,000Hz within plus-or-minus 3dB - a remarkable range extending far beyond typical integrated amplifier specifications. Signal-to-noise ratio exceeds a strong 90dB. At 115 x 430 x 360mm and 15kg, the A21SE represents a substantial commitment reflecting Sugden's most storied Class A engineering heritage.
Sound and use context
Expect the warm, richly textured character Class A amplification is broadly celebrated for, with the exceptionally wide 12Hz-141kHz bandwidth combined with the modest power output reflecting Sugden's storied Class A design philosophy.
Pairing
The modest 30W-40W output pairs best with notably efficient loudspeakers to achieve satisfying dynamic headroom, given the inherent power constraints of Class A design.
Alternatives
Other manufacturers' comparable Class A integrated amplifiers offer alternatives for buyers wanting to compare features at a similar price point.
Key specs that matter
Five single-ended inputs are provided. Input sensitivity is 110mV. Output power is a modest 30W into 8 ohms, rising to 40W into 4 ohms - a classic figure reflecting the design's storied Class A operating philosophy. Frequency response spans an exceptionally wide 12Hz to 141,000Hz within plus-or-minus 3dB - a remarkable range extending far beyond typical integrated amplifier specifications. Signal-to-noise ratio exceeds a strong 90dB. At 115 x 430 x 360mm and 15kg, the A21SE represents a substantial commitment reflecting Sugden's most storied Class A engineering heritage.
Sound and use context
Expect the warm, richly textured character Class A amplification is broadly celebrated for, with the exceptionally wide 12Hz-141kHz bandwidth combined with the modest power output reflecting Sugden's storied Class A design philosophy.
Pairing
The modest 30W-40W output pairs best with notably efficient loudspeakers to achieve satisfying dynamic headroom, given the inherent power constraints of Class A design.
Alternatives
Other manufacturers' comparable Class A integrated amplifiers offer alternatives for buyers wanting to compare features at a similar price point.
Specifications
Model name
A21SE
Type
N/A
Analog inputs (balanced)
N/A
Analog inputs (single-ended)
5
Input sensitivity (mV)
110
Input impedance (balanced) (Ω)
N/A
Input impedance (single-ended) (Ω)
N/A
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
D/A conversion
N/A
Phono MM/MC current-sensing input impedance (Ω)
N/A
Output power (8Ω) (W)
30
Output power (4Ω) (W)
40
Gain (dBu)
N/A
Frequency response low +/- 3dB (Hz)
12
Frequency response high +/- 3dB (Hz)
141 000
Signal to Noise Ratio (dB)
>90
Total Harmonic Distortion + Noise (%)
N/A
Damping factor
N/A
Dimensions (mm)
115 x 430 x 360
Weight (kg)
15
Official link
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