MINT Used Sugden Masterclass SPA-4 Power Amplifier
A superb used example of this stunning Class A power amp
The stereo power amplifier SPA-4 and its big brother, mono power amplifier MPA-4, have been developed to present a holographic three dimensional soundstage where the listener can almost walk in and touch the musicians. Tremendous headroom is available in which to develop a wonderfully dynamic portrayal of music in all of its moods - ‘simply more music’.
The stereo power amp has facilities for asymmetric (phono/RCA) or balanced inputs, the latter utilising a virtual transformer (discreet) balanced input circuit. The power amplifiers are symmetrical, current feedback, dc-coupled, gain stages with servo controlled dc off-set and multi emitter output devices. In the balanced mono amps the two power output stages of the stereo power amp are connected in balanced mode giving a mono amplifier. The mono amplifiers give single channel power twice that of the stereo amps. Among some of the gains of the balanced configuration is a much lower noise floor, even greater dynamics and a rock solid musical sound stage.
Masterclass SPA-4 Stereo Power Amplifier
Inputs: Stereo line level, stereo balance
Outputs: Stereo pair multi way locking binding posts
Input sensitivity: 1 volt for full output
Power output: 75 Watts into 4 ohms both channels working
Frequency response: +/-0dB 15Hz-30kHz
Bandwidth: -3dB points 2Hz-200kHz
Signal to noise: >85dB
Nett weight: 25 kgs
Dimensions: 250mm x 430mm x 360mm (h x w x d)
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