Amplificator Integrat Yamaha A-S2000
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Numar articol:200576215
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Anuntul a expirat la:21.09.2018, 15:31
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Specificatii
Yamaha Introduces a New, Superior Approach to Analogue Amplifier
Design. Full Floating and Balanced Circuit Design Achieves for the
First Time the Full Potential of Analogue Amplification. I/O (input
to output) Direct Symmetrical DesignFull-stage balanced signal
transmissionFloating balanced power ampFully balanced control
ampThree parallel balanced volume and tone controlsFour large
capacity power supplies for power ampShunt type local regulators
for preamplifierDiscrete headphone amp for low-impedance
driveDiscrete phono amp with high-precision head amp and equaliser
ampSpecially designed feetYamahas involvement with and passion for
music goes back more than a century, to when we built our first
reed organ in 1887. Now we are the worlds leading producer of
pianos and other musical instruments, and are involved with music
in many other ways as well. We manufacture professional recording
equipment, we design concert halls and we assist artists at
concerts with set up and sound tuning. This knowledge and
experience benefits our production of audio components in many
ways. We introduced our first HiFi (High Fidelity) turntable in
1954, becoming the first company to actually use the term HiFi.
Thereafter we were one of the first to offer mass-produced, high
quality audio equipment, and introduced many legendary stereo
components. We hope you enjoy the genuine HiFi experience of Yamaha
Natural Sound.Full Floating and Balanced Circuit Design Achieves
for the First Time the Full Potential of Analogue Amplification
More than forty years have passed since the introduction and
widespread adoption of full transistor HiFi audio amps during the
1960s. In the 1970s, high performance, high output PNP-NPN
transistors made possible the pure complementary configured power
amps that are now the main type of high quality audio amps. In
recent years, however, digital amps have become popular for their
high conversion efficiency and superior uniformity of operating
precision, as well as for their lower weight, size and heat
production as compared to analogue amps. Which leads to the
question, which direction will audiophile-level amps take in the
future? Generally, two possibilities are considered: continuing to
improve the traditional pure complementary configuration analogue
amps or working to achieve higher sound quality from digital amps.
But Yamaha has selected a third approach. This is an entirely new
floating and balanced power amp that, by using power transistors
with the same polarity that are not complementary, achieves
complete symmetry of pullable operation at the output stage and
permits full balanced transmission (amplification) from the input
jack to just before the speaker jacka capability that has long been
the dream of audiophiles.Full-Stage Balanced Signal Transmission
The A-S2000 achieves fully balanced signal transmission from input
to output (balanced design refers to the use of two signal
conductors that have equal impedances to ground). Balanced
transmission is capable of canceling noise produced internally and
externally, and so is considered to be an ideal amplification
method, eliminating the sound quality degradation caused by noise.
If it is only partially adopted, however, it will be largely
ineffective and may even have negative effects. The A-S2000 is the
worlds first integrated amp to offer full-stage balanced
transmission, combining high power output with good sound texture
and outstanding S/N performance. Its capabilities will be heard to
best effect when paired with the CD-S2000 CD player, which employs
the same principle.Floating Balanced Power Amp The Floating
Balanced Power Amp configuration is completely different from the
pure complementary circuit design that has been the mainstream of
HiFi amps for nearly forty years. It adopts an output element
having identical polarity on the plus and minus sides of the output
stage, with both sides having their own power supply and feedback,
thereby achieving total symmetry of pullable operation at the
output stage. The power supply unit has four floating elements (no
restrictive grounding connections), two for each channel, so plus
and minus and completely symmetrical.Fully Balanced Control Amp To
achieve fully balanced transmission, all audio circuits except for
the phono equalizer are balanced. The line amp also uses a balanced
configuration for its volume and tone circuits, achieving fully
balanced transmission from the XLR balanced input jack to just
before the speaker jack. Additionally, the output from the
unbalanced RCA input and phono equalizer undergoes balance
conversion internally.Parallel Volume and Tone Controls To ensure
ideal fully balanced operation, the volume and tone control systems
must be extremely precise. Conventional analogue volume systems
suffer from gang error, and cannot achieve sufficient accuracy,
even when using high precision parts. Therefore, for the A-S2000 we
developed a unique method: canceling out slight precision
differences by the parallel operation of three high sound quality
digital volume ICs for each channel and operating the system with
an analogue encoder. When using the bass and treble tone controls,
each of the three volume elements is applied in succession, and
during tone default, three equivalent volume elements for each
channel are used for volume adjustment. This ensures the best sound
quality during both tone control and default operation.Power Supply
The A-S2000 has four large capacity power supplies for the power
amp that are completely isolated from ground. Shunt type local
regulators that prevent degradation of sound quality by amperage
fluctuation ensure a clean and stable power supply for the preamp.
Naturally, parts that directly affect sound quality such as the
large power supply transformer and carbon sheath block capacitors
were chosen only after careful evaluation.Symmetrical
ConstructionEnlarge Completely symmetrical construction with
integrated amp left-right separation.The A-S2000 has a completely
symmetrical construction intended to achieve the ultimate in
integrated amp left-right separation, equal to that of separate
amps. A central reinforcing bar ensures that the chassis is rigid
and stable. Specially Designed Feet The extra-heavy feet provide a
choice of two bases. You can leave the round, flat neodymium
magnets in place or remove them to rest the amplifier on four
single points. The feet are also height adjustable. They ensure
stability on any surface, with superior vibration damping.Headphone
Amp for Low Impedance Drive The fully discrete, high performance
headphone amp is compatible with low impedance drive. Its pure and
powerful sound quality is best appreciated with high quality
headphones.Discrete Phono Amp An extremely low-noise phono amp plus
a dedicated MC head amp ensure excellent musical clarity and
imaging with both MC and MM phono cartridges.
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