SUGDEN AUDIO MASTERCLASS SPA-4 AND SAPPHIRE FBA-800


Sugden Audio offer two stereo power amplifiers at a fairly similar price point, the Masterclass SPA-4 and the Sapphire FBA-800. Power output is also similar, but the circuit designs are completely different. The SPA-4 is rated at 50 Watts class A but will move into class AB to provide extra headroom for more dynamic passages of music or impedance swings presented by the loudspeaker. The FBA-800 is 40 Watts Pure Class A but a high current design. It uses two 20 Watt pure Class A power amplifiers per channel in a floating bridge configuration and is also true balanced.

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