Sugden Masterclass Power Amplifier SPA-4

  • 1500.00 £
  • Published date: November 11, 2023
    • Winfrith Newburg, Dorset, United Kingdom

Sugden Masterclass Power Amplifier SPA-4

⭕ MINT Used Sugden Masterclass SPA-4 Power Amplifier Graphite Finish

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)

Phone number ✆ 01305 726087
Winfrith Newburg, Dorset

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