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Sugden Masterclass FPA-4 Power Amplifier
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Sugden Masterclass FPA-4 Power Amplifier

£2,537.50 Exc. VAT |  


Sudden Masterclass FPA-4 Power Amplifier

The FPA-4 power amplifier is the latest member of the Sugden Masterclass Family. This output stage is of the classic Sugden pure class A single ended design which has given musical enjoyment to thousands of discerning music lovers over many years. The amplifier benefits from a comparator and correction circuit so that errors which would occur in the power stage, due to varying loads and distortion, are corrected to match the output of the high impedance input amplifier. Whilst it is maintaining the signal authenticity it is also increasing the load stability and forces the output impedance to zero. The Amplifier with Sugden Error Correction has extremely low open loop output impedance with a resultant high damping factor at relatively high frequencies.

Coupling of the output of the Amplifier to its chosen speakers is via a ‘soft connection’ protection board. It is a static contact switching board using extremely low ‘on resistance’ power mosfets. These devices are timed on and off to enable soundless connection to the speakers however sensitive.  The FBA-4 is an exciting new design that performs well above its modest price point.


Inputs: Stereo line level

Outputs: Stereo pair multi-way locking binding posts 

Input Sensitivity: 1 volt for full output

Power Output: 25 Watts per channel both channels working

Frequency Response: +/-0.3dB 18Hz-95kHz

Bandwidth: 10Hz-125kHz

Signal to Noise Ratio: >82dB

Distortion at 1 watt 1kH: <0.04%

Gross Weight (Packed): 15kgs

Dimensions: 143mm x 430mm x 350mm (hwd)

The manufacturer reserves the right to change specifications without notice.

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