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The A-47 is a successor model to the A-46, based on the design
technology developed for higher-ranked models. It is a full-fledged Pure
Class A Stereo Amplifier that produces truly captivating sound.
The output stage of the A-47 uses high-performance power MOS-FETs ideal
for audio applications. For each channel, six devices are arranged in a
parallel push-pull Pure Class A arrangement. This results in very low
output impedance, ensuring that constant drive voltage is available also
for low-impedance loads. Superior performance is evident from the
linear power progression of 45 watts into 8 ohms, 90 watts into 4 ohms,
and 180 watts into 2 ohms. The amplifier is even capable of driving
ultra-low 1-ohm impedances with an amazing 360 watts (music signals
The input stage circuitry is configured as an instrumentation amplifier.
This approach makes it possible to achieve fully balanced signal paths,
extending from the signal input all the way to the final power amp
Using the A-47 in bridged mode creates a mono amplifier with even more
impressive power output capability, rated for 180 watts into 8 ohms, 360
watts into 4 ohms, and 720 watts into 2 ohms (music signals only).
Pure Class A operation delivers quality power: 45 watts x 2 into 8 ohms
Power MOS-FET output stage features 6-parallel push-pull configuration
Instrumentation amplifier principle used in amplification stage
Further evolved MCS+ circuit topology
Current feedback principle combines stable operation with outstanding sound quality
Bridged connection mode allows upgrading to monophonic amplifier
Large high-efficiency toroidal power transformer
4-stage gain control
Specificatii Amplificator de Putere Accuphase A-47
Music is an oasis that refreshes us in our journey of life.
Music can be soothing, exciting, exhilarating. It can move our hearts and enrich our lives, which is the goal we at Accuphase seek through audio technology.
This was the idea behind the slogan "Enrich Life through Technology" which originally brought together the group of very highly skilled audio experts who conceived and today produce the successful Accuphase line of audio equipment. It is the guiding principle behind all Accuphase components whose high grade can be considered extravagant. Just as there are exquisite musical instruments that are especially highly prized, we believe that the same applies to audio components. This belief forms the basis of our design concept. It is the reason why we strive to build extra value into each of our units so that they will display fully the merits of hand construction.
The name ACCUPHASE was adapted by taking the prefix ACCU from the word "accurate", and combining it with PHASE which is a most important factor in audio technology. We feel it is a very fitting brand name to describe our products that fully portray this and other important characteristics, which penetrate the innermost depth of audio technology. Our endless pursuit of quality requires a very high degree of processing which persuades us to avoid the use of mass production systems. Consequently, production volume is limited and Accuphase products are available only at a restricted number of specialized stores.
Accuphase equipment is not subject to the whims of market fashion since they are made, above all, to achieve true high fidelity sound reproduction. This is the foremost reason why our products have enjoyed long-run production.
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