British manufacturer Sugden has released a monobloc Class-A power amplifier to mark its 50th anniversary.

Dubbed the ‘Grande’, the new amplifier uses pure Class-A circuitry in floating bridged mode. ‘The amplifier circuit is best described as an instrumentation-quality, Class-A, floating bridge design that’s d.c.-coupled with current feedback and includes full output stage protection,’ said George Neophytou, of Neophonics, which distributes Sugden in Australia.

Each Sugden Grande has a custom-designed mains transformer of 430-watts with four separate windings and the power supplies to the floating bridge output stage are smoothed by two specially-developed audio-grade capacitors, having a combined capacitance of 40,000µF. The output stage uses 12 output devices, each with a current rating of 17-amps.The amplifier’s input stage has switching for use with balanced or single-ended inputs, plus there’s a 6dB attenuation facility for input signal matching.

Longevity is a key consideration when designing Sugden equipment,’ Neophytou told Australian Hi-Fi Magazine, ‘so only gold plated circuit boards containing the highest quality discrete electronic components are utilised in the assembly, together with high-quality connectors and silver wiring are utilised to give long life and the ultimate musical performance.’

For those concerned about the high power consumption of pure Class-A amplifiers, and the heat that’s produced, the Sugden Grande offers a an ‘Eco Level’ setting, which it claims reduces power consumption by up to 75 per cent and results in the amplifier dissipating far less radiant heat. ‘This setting is perfect for low-level listening where listeners are still able to take full advantage of a fatigue-free uncompressed massive sound stage,’ said Neophytou. Available, the Sugden Grande Monoblocs retail for $46,500 per pair (RRP).

Manufacturer’s Specifications: Sugden Grande Power Amplifier

Power Output: 100-watts into 8Ω; 190-watts into 4Ω
Frequency Resp: 6Hz–117kHz ±3dB
S/N Ratio: >90dB
Dimensions (HWD): 430×430×470mm
Weight: 35kg (each)
Price: $46,500 (per pair)

For further information, please contact Neophonics