Sugden Sapphire FBA-800
Stereo Power Amplifier
The FBA-800 is Sugden Audio’s most advanced power amplifier. The floating bridge design combines four 20 Watt amplifiers in a single stereo chassis and provides several key benefits. Each channel consists of two amplifiers working as voltage amplifiers driving an output stage of bridged power transistors. The advantages are a low noise floor, better power output relative to the voltage rails (x2) and with the fixed current of the class A mode, low output impedance and better load tolerance.
The Power amplifier is D.C. coupled, with a servo lock, ensuring excellent low frequency detail. For safety purposes the amplifier includes a D.C. protection circuit. This circuit is statically switched using extremely low impedance Mosfet switching devices. This circuit also soft switches the power amp on and off. The power supply is a low impedance design with a single custom made bi-filar wound transformer, with four separate windings. The main smoothing capacitors for the output stage are specially developed for professional audio applications with excellent ripple characteristics and long life. The Four power transistors per channel in the output stages are multi emitter devices with an output capability of 26 amps per device. The FBA-800 operates in the full balanced mode from the input of the unit to the output
Purist amplification for the connoisseur. The Sapphire series is the most satisfying and musical pre and power combination available from Sugden. This achievement follows a two year period of developing unique circuit designs and concepts. We have redesigned the building blocks of pure class A and through modern high quality components discovered its full potential. The same philosophy has been employed in our Sapphire DAP-800 pre-amplifier, resulting in the exciting development of the Sugden VCV circuit.
Sugden Sapphire FBA-800 Technical Specification
Inputs – Stereo line level, stereo balanced
Outputs – Stereo pair multi-way locking binding posts
Front Panel Gain Selector – 6dB input attenuation
Front Panel Input Selector – RCA or XLR
Input Sensitivity – 735mV for full output
Power Output – 40 Watts into 8 Ohms both channels working
Frequency Response – 0dB 20Hz-80kHz
Bandwidth – 6Hz-113kHz
Signal to Noise – >96dB
Distortion at 1 Watt 1kHz ->0.05%
Gross Weight (packed) – 25kgs
Dimensions – 206 x 430 x 460mm (hwd)
A21 Pure Class A
The A21 was the worlds’ first production pure class A transistor amplifier and a great success.
The partnership with Richard Allan was short lived and within a year the amplifier was renamed the SUGDEN A21. Shortly afterwards, manufacturing was moved to larger premises in Cleckheaton, West Yorkshire
Present day
Today they still manufacture in the same tradition with each Sugden product being handmade by a single highly skilled team member. Half of the team have been with the company for over thirty years enjoying a life-long career. Our involvement in the full manufacturing process still exists from design to despatch. We operate our own custom engineering shop , screen printing and assembly room.
Sugden products are a truly handmade quality British product.
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