Yamaha A-S2100 Integrated Amplifier (Black)

Description

A-S2100

This high-grade
integrated amplifier has inherited the natural sound of Yamaha in the pursuit
of rich musicality. Advanced original amplifier circuitry and elimination of
signal loss has resulted in a truly dynamic, affecting sound.

• Floating and balanced power amplifier
  with MOSFETs

• All-stage fully discrete construction,
  balanced transmission and low impedance design

• Superior quality electronic volume
  control for optimum sound

• Large capacity power supply unit
  delivers energetic, dynamic sound with fast response

• Symmetrical design in pursuit of ideal
  stereo reproduction

• Discretely configured phono amp

• Headphone amp with fully discrete
  configuration

• Level meters visually reflect the
  dynamics in the music

• Elegant design with luxurious real wood
  panels

• Original speaker terminals combine ease
  of use and beauty with high sound quality

 

Floating and Balanced Power Amplifier with MOSFETs

The basic design of
the power amp circuit adopts Yamaha’s own uniquely developed floating and
balanced power amplifier technology. Adopting output elements with the same
polarity on the plus and minus sides of the output stage, and also completely
separating the NFB (negative feedback) circuit and power supply into a total of
four plus and minus sides of the left and right channels, results in thoroughly
symmetric push-pull operation of the output stage. Completely floating the
entire power amp circuit from the ground removes any negative impact of minute
voltage fluctuations or ground noise. Moreover, the output elements are
comprised of MOSFETs, which provide a warm and natural sonic character. The use
of MOSFETs, which have the same polarity on the plus and minus sides, further
evolves the ideal of a complete symmetrical design by eliminating sound quality
variations due to difference in polarity — a major distinguishing
characteristic of the floating and balanced power amplifier — resulting in
sound with a superior signal-to-noise ratio and superbly well-defined sound
field.

All-stage Fully Discrete Construction, Balanced
Transmission and Low Impedance Design

The A-S2100 has
achieved a fully discrete configuration during tone defeat by thoroughly
separating the tone control circuit from the signal system. This not only
increases response, but also improves slew rate and results in high range
reproduction of greater vitality, richness and smoothness. Signal transmission
and amplification features fully balanced transmission for thoroughly balanced
operation, even of the control system circuitry. Signal loss through
transmission has been significantly reduced through the application of screw
clamp connections and thick cables between the preamp and power amp units. This
is vital for signal transmission between the power amp units and the power step
to the speaker terminals. This improves the damping factor and improves driver
capacity and damping power of the speaker, resulting in vibrant and powerful
bass reproduction.

Superior Quality Electronic Volume Control for Optimum
Sound

We’ve utilized a
high-quality digital volume control, specially designed by New Japan Radio Co.,
Ltd., which consists only of ladder-type resistance, removing the impact of
slew rate decline or coloring of the sound, delivering higher purity in the
sound and excellent, fast response to large volume changes and steep transients.
Moreover, the tone controls employ a triple-parallel method, minimizing the
detrimental impact on sound quality seen with straight-line tone controls. In
addition, the bass, treble and common circuits each utilize simple construction
in which the NFB of the amp is not used and the CR elements are simply fixed in
a straight line. This ensures exceptionally pure sound reproduction, even when
tone control is applied and super response to audio signal transients. When
tone defeat is applied, straight signal flow from only one volume circuit to a
discrete configuration buffer amp is realized.

Large Capacity Power Supply Unit Delivers Energetic,
Dynamic Sound with Fast Response

The A-S2100 employs
an original EI transformer, carefully customized for optimum compatibility with
the chassis. Combining four large capacity carbon sheath block capacitors
delivers an energetic sound — even during high volume — that is possible with
the A-S2100. Moreover, since the control amp and control system is equipped
with 12 shunt-type local regulators that prevent deterioration caused by
currency fluctuation, a clean and stable power supply is achieved. The EI
transformer is mounted on the chassis using a brass washer, restricting
internal vibration that would result in noise.

Symmetrical Design in Pursuit of Ideal Stereo
Reproduction

The left-right
symmetrical construction, with the power supply in the center and the power amp
blocks on the ends, achieves greater separation of the left and right channels
— necessary for proper two-channel stereo reproduction — and ideal weight
balance. Fine tuning by a center frame, which extends from the front to the
back of the casing and specially made metal legs (selectable as spike or pad),
gives the A-S2100 superb mechanical rigidity and installation stability that
dramatically lessens the impact of external vibrations on sound quality.

Discretely Configured Phono Amp

The phono amp is
comprised of an MC head amp and an equalizer amp, each of which are discretely
configured, resulting in a rich sound with pronounced musicality when playing
vinyl records with both MC and MM phono cartridges.

Headphone Amp with Fully Discrete Configuration

The headphone amp is
also equipped with fully discrete configuration for preeminent drivability and
damping properties. Included, as well, is a specialized level trimmer that
responds to various load impedances. The superior quality sound that only the
A-S2100 can attain is yours to enjoy, even when listening on headphones.

Level Meters Visually Reflect the Dynamics in the Music

The center of the
main unit features level meters that provide visual enjoyment of the music as
well, with the rapid and delicate movement of the needles. The meter is
illuminated softly from inside by LED, giving a warm, beautiful lamplight look.
The meter indicators can, along with VU display, be switched to peak display
and can be selected according to your preferences. The window of the meters has
been precision-fit to the panel — completely flat, with no gaps — for an
elegantly beautiful appearance.

Elegant Design with Luxurious Real Wood Panels

The refined design
and construction of the A-S2100 reflects Yamaha’s commitment to fine
craftsmanship and art, uniquely drawing on its long experience as a world-class
musical instrument maker. The metal front panel and the side wood panels have
been beautifully integrated by the masterful use of advanced processing
technology. Moreover, the dials and tone controls are machined aluminum knobs
for a richly textured finish and graceful touch.

Original Speaker Terminals Combine Ease of Use and Beauty
with High Sound Quality

Our meticulous
obsession with quality continues through to the speaker terminals, which are
the last and crucial link in the audio chain. Screw-type terminals, with
originally designed handles created by cutting pure brass, enable a secure
connection with no reduction in sound quality. Contoured to the shape of human
fingers, they not only look beautiful, but can be turned easily and fastened
tightly with minimal effort. They are also compatible with connections using
banana plugs.

Insulators Allow Use of Spikes or Pads

The insulators are
crucial parts that block outside vibrations. They adopt Yamaha’s original metal
legs in order to maximize vibration and control performance. The user can
select point installation by applying the supplied spikes or plane insulation
with the supplied pads and use these combined with an interlocking rack if desired.

Remote Control with Simple Design and Superior Texture

The supplied remote
control features a design complementary to the aluminum panel of the amplifier
itself, with a simple, easy-to-understand button layout and gorgeous metallic
texture. In addition to the basic volume adjustment and input switching
controls of the A-S2100, it can also be used for operation of the companion
CD-S2100.