The FBA-800 is the kind of power amplifier that reframes what 40 watts of Class A can do — four bridged output stages working in full balanced mode from input to output, with a noise floor so low the silence between notes feels almost tactile. Bass arrives with genuine weight and control; midrange carries the tonal density and body more often associated with fine tube amplifiers than solid-state. There's no grain, no fatigue — just music delivered with an effortless authority that Sugden has refined over decades in West Yorkshire. Pair it with a revealing source and you stop listening to the system entirely.
- Condition
- NEW
- Factory Specs
Power Output 40W into 8 Ohms (both channels driven)
Frequency Response 0dB, 20Hz–80kHz
Bandwidth 6Hz–113kHz
Signal to Noise >96dB
Input Sensitivity 735mV for full output
Inputs Stereo line level, stereo balanced (RCA or XLR)
Outputs Stereo pair multi-way locking binding posts
Front Panel Gain Selector 6dB input attenuation
Front Panel Input Selector RCA or XLR
Dimensions 8.11 × 16.93 × 18.11 in (H × W × D)
Gross Weight (packed) 55.1 lbs (25 kg)
Warranty 5-year workmanship guarantee; third-party components covered 1 year parts + labor, 2nd year parts only; non-transferable
- Documentation
- Sugden Sapphire FBA-800 Owner's Manual
- Liner Notes
The FBA-800 is our 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.
- Stock No.
- 15481105973469
The FBA-800 is the kind of power amplifier that reframes what 40 watts of Class A can do — four bridged output stages working in full balanced mode from input to output, with a noise floor so low the silence between notes feels almost tactile. Bass arrives with genuine weight and control; midrange carries the tonal density and body more often associated with fine tube amplifiers than solid-state. There's no grain, no fatigue — just music delivered with an effortless authority that Sugden has refined over decades in West Yorkshire. Pair it with a revealing source and you stop listening to the system entirely.
Condition
NEW
Factory Specs
Power Output 40W into 8 Ohms (both channels driven)
Frequency Response 0dB, 20Hz–80kHz
Bandwidth 6Hz–113kHz
Signal to Noise >96dB
Input Sensitivity 735mV for full output
Inputs Stereo line level, stereo balanced (RCA or XLR)
Outputs Stereo pair multi-way locking binding posts
Front Panel Gain Selector 6dB input attenuation
Front Panel Input Selector RCA or XLR
Dimensions 8.11 × 16.93 × 18.11 in (H × W × D)
Gross Weight (packed) 55.1 lbs (25 kg)
Warranty 5-year workmanship guarantee; third-party components covered 1 year parts + labor, 2nd year parts only; non-transferable
Documentation
Sugden Sapphire FBA-800 Owner's Manual
Liner Notes
The FBA-800 is our 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.
Stock No.
15481105973469
