Inputs & Outputs
Front-Panel + Remote Control
Floating & Balanced Amplifier Design: The basic design of the
A-S1100's power amplifier circuit adopts a unique floating and balanced power
amplifier technology developed by Yamaha. Adopting output elements with the same
polarity on the plus and minus sides of the output stage, along with 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 a
thoroughly symmetric push-pull operation of the output stage. Completely
floating the entire power amplifier circuit from the ground removes any negative
impact of minute voltage fluctuations or ground noise.
MOSFET Outputs: The amplifier's output elements are comprised of
MOSFETs, which provide a warm and natural sonic characteristic in the audible
playback. The use of MOSFETs, which have the same polarity on the plus and minus
sides, further evolves the ideal symmetrical design to eliminate sound quality
variations due to difference in polarity, a major distinguishing characteristic
of the floating and balanced power amplifier. This results in sound with a
superior signal-to-noise ratio and superbly well-defined sound fields
Dedicated Single-Ended Amplification: Since this device employs a
dedicated single-ended amplifier, it provides excellent response in the
amplification of single-ended analog sound from all kinds of audio sources such
as CD players and D/A converters. By fully utilizing single-ended amplification,
the A-S1100 transparently draws out the intrinsic qualities of your favorite
audio devices, including those made by other manufacturers.
All-Stage Full Discrete Configuration: This amplifier adopts an
all-stage, fully-discrete configuration through all sound circuit stages using
only the most meticulously selected, high-precision parts from input to output
(applicable during tone control circuit defeat). The slew-rate of the audio
signal has been improved to bring lively and strong response to high musical
notes. Moreover, the tone control circuit lets you switch to the defeat-state
and enable a full-discrete configuration that bypasses the op-amp IC of the
internal circuit, simply by setting the BASS / TREBLE knobs to their center
Low-Impedance Design: By strengthening the capacity of the
high-current route (raising the section area of the cable core wire to about 60%
of that of the A-S1000) and by pursuing thorough low-impedance design and
forming screw-clamped wire connections of major ground points, the A-S1100
boasts excellent speaker drive power with a damping factor of more than 250 (8Ω,
1 kHz). Along with the large capacity power source transformer equipped with an
EI core, this design delivers bass reproduction that is powerful.
Symmetrical Design: The left-right symmetrical construction with the
power supply in the center and the ends of the power amp blocks achieves greater
separation of the left and right channels. This is necessary for proper
two-channel stereo reproduction and ideal weight balance. The center frame is
fine-tuned which extends from the front to the back of the casing and with
specially made metal legs (selectable from spike or pad), the A-S1100 has superb
mechanical rigidity and installation stability that dramatically lessens the
impact of external vibrations on sound quality.
Large Capacity Power Supply: The A-S1100 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 only possible with the A-S1100.
Moreover, since the control amp and control system is equipped with twelve shunt
type local regulators that prevent deterioration caused by current 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.
Elegant & Sophisticated Design: The refined design and construction of
the A-S1100 reflects the commitment to fine craftsmanship and art that Yamaha
has exhibited for over a century as a world-class musical instrument maker. This
amplifier offers a metal front panel and side wood panels that have been
beautifully integrated by the masterful use of advanced technology. Moreover,
the dials and tone controls are machined aluminum knobs for a richly textured
finish and graceful touch.
Inputs & Outputs
6 RCA Inputs: The Yamaha A-S1100 is equipped with six
unbalanced analog RCA stereo inputs for connecting an external audio source such
as a CD player, AM/FM tuner, Turntable, and/or cassette deck; as well a preamp
or AV receiver. There is also one analog RCA stereo output for recording through
Main Direct Input: One of the A-S1100's analog inputs is
labeled Main Direct Input. This input allows you to connect your preamplifier or
AV receiver directly to the A-S1100 and use the Yamaha integrated amp as a power
amplifier to drive a pair of speakers in your system.
Note: Audio signal coming into the amplifier's Main
Direct Input is only output through the speaker outputs of the A-S1100. No
audio signal will by output from the stereo amplifier's Pre-Out, Rec Out, or
Discrete Configured Phono Preamp: The phono preamp is comprised of a
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. The unit's Phono input consists of stereo
RCA jacks and a ground terminal. There is a switch on the back panel which
allows you to indicate what type of turntable cartridge (MC/MM) you are using.
High-Quality Binding Post Terminals: Yamaha's meticulous obsession
with quality continues through to the speaker terminals, which are the last and
crucial link in the audio chain. Featuring two sets of binding-post speaker
terminals (A&B) with originally designed handles; these are created by cutting
pure brass enabling 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.
Note: You can use the A & B speaker outputs to power two pair
of separate speakers or you can bi-wire a single pair of speakers. If you use
two sets (A and B) of speaker, the impedance of each speaker must be 8-ohm or
higher. When only using one set of speakers (A or B), use speakers with an
impedance of 4-ohm or higher.
Pre-Outs: The Yamaha integrated amplifier is equipped with a
stereo preamp output for connecting a powered subwoofer or to use the A-S1100 as
a preamplifier and connect it to a larger power amplifier to power your
Headphone Jack: The A-S11000 integrated amplifier is
equipped with a front-panel 1/4" headphone jack for connecting a pair of
headphones (sold separately). Once a set of headphones are connected, the
amplifier's speaker outputs mute automatically.
Note: The headphones do not function for the amplifier Main
Trigger Input + Remote Input/Output: The A-S1100 features a
12V trigger input (3.5mm) to synchronize power on /off with another component
that features a 12V trigger output. The integrated amp also has remote input and
remote output minijack terminals for use with external IR receivers and
compatible Yamaha components.
Front-Panel + Remote Control
Front-Panel Controls: The integrated amplifier offers the
following convenient front-panel controls - Volume, Input Select, Bass & Treble,
Balance, and A+B Speaker Selection.
Remote Control: The supplied remote control features a design
complementary to the aluminum front panel of the amplifier with a simple,
easy-to-understand button layout and a gorgeous metallic texture. In addition to
the basic volume adjustment and input switching controls of the A-S1100, it can
also be used to operate Yamaha CD players (sold separately).
Electronic Volume Control: Yamaha 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. This delivers 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.
Triple-Parallel Tone Control: 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
exceptional sound reproduction even when tone control is applied. When tone
defeat is applied, straight signal flow from one volume circuit to a discrete
configuration buffer amp is achieved.
Level Meters: The center of the main unit features level meters that
provide visual enjoyment of the music with rapid or delicate movement of the
needles. The meter is illuminated softly from inside by LEDs, giving a warm,
beautiful lamplight look. The meter indicators, along with VU display, can be
switched to show peak power as well, according to your preferences. The meter's
window has been precision-fit to the panel and lays completely flat with no gaps
for an elegant and beautiful appearance.
Auto Power Standby: The integrated amplifier enter standby
mode automatically if not operate for approximately 8 hours.