⭕ 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

Facilities

Inputs: Stereo line level, stereo balance

Outputs: Stereo pair multi way locking binding posts

Specification

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)