The Sugden Audio Sapphire FBA-800 stereo power amplifier is Sugden’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 Sugden FBA-800 operates in the full balanced mode from the input of the unit to the output

Technical Specifications 

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
Gross Weight – 25kg
Dimensions W x H x D (mm) – 430 x 206 x 460
Finish Options –
Graphite and Titanium £8.530
Gunmetal Blue, Grey, Bronze, Copper, Orange, Green 3, Green 2, Apple Green, Blue 3, Blue 2, Turquoise, Violet and Red £8,700