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Based on the P-4100, the stereo power amplifier Accuphase P-4200
represents a full model change with further enhanced overall circuitry.
Latest instrumentation amplifier topology is implemented in the entire
configuration of the P-4200, allowing not only fully balanced signal
paths from the inputs onwards, but also the realization of a gain
control that effectively minimizes residual noise.
The P-4200 features the MCS+ topology in combination with current
feedback, ensuring outstanding S/N ratio and superior electrical
performance characteristics. The output stage for each channel uses
three pairs of high-power transistors with a Pc rating of 220 watts,
arranged in a parallel push-pull configuration. This ensures low output
The output circuitry also benefits from the latest technology
advances. Output relays have been replaced by MOS-FET switches that
combine excellent reliability with highly pure amplification. Redesigned
output coils and other features result in lower energy losses and allow
a drastic improvement of the damping factor to 500. This rating not
only points towards an extremely wide power bandwidth, it also means
that the degree of coupling between loudspeakers and amplifier has been
tightened even further, resulting in music playback of impressive
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