Magnat MA400
Magnat MA 400 hybrid integrated amplifier, valve preamp and transistor output stage, with MM phono input for turntable.
Description
The Magnat MA 400 is a hybrid integrated amplifier that combines two distinct amplification technologies: a valve preamplifier stage followed by a transistor output stage. This architecture allows the sonic qualities characteristic of the valve to be combined with the stability and power delivered by the transistors at the output.
The stated power is 2 × 40 W, with a peak that can exceed 150 W, reflecting an ability to absorb dynamic passages without noticeable compression. The signal-to-noise ratio of 95 dB indicates a contained level of residual noise, favourable to clean listening on quiet passages. The unit also has a double set of speaker terminals, useful for bi-wiring or connecting two pairs of speakers.
This model is aimed at hi-fi enthusiasts looking for an amplifier with a character marked by the valve, without giving up the rigour of the transistor at the output. The presence of an MM phono input makes it a relevant choice for turntable owners wishing to integrate their analogue source directly, without a separate phono preamplifier.
Technical specifications
| Type | Hybrid integrated amplifier (valves + transistors) |
| Preamplifier | Valve |
| Output stage | Transistor |
| Power | 2 × 40 W (peak > 150 W) |
| Phono | Moving Magnet (MM) input |
| Signal to noise ratio | 95 dB |
What to check before buying used
The valve preamplifier deserves careful checking: microphony, hum or an unbalanced channel often indicate valves reaching end of life that will need replacing. Also check the smoothness of the volume and balance potentiometers, crackling on movement revealing an oxidised resistive track, as well as the condition of the coupling capacitors, which can age over the years. The MM phono input is best tested with a real source to rule out any hiss or ground hum specific to this stage.
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