Enjoy superior audio quality with dedicated single-ended and high-grade integrated amplification that faithfully draws out all of the emotional and dynamic sound from your favorite players as only Yamaha can do.
and balanced power amplifier with MOSFETs
fully discrete configuration for strong reproduction of high frequencies
capacity power supply delivers energetic, dynamic sound with a fast
design in pursuit of ideal stereo reproduction
quality electronic volume control for optimum sound dynamics and an
low-impedance design ensures powerful bass response
configured phono amp
meters visually reflect the dynamics in the music (peak / VU)
speaker terminals combine ease of use and beauty with high sound quality
design with luxurious real wood panels
Floating and Balanced Power Amplifier with MOSFETs
The basic design of the 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. Moreover, the 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 Amplifier for All Types of Audio
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 for Strong
Reproduction of High Notes
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 points.
Thorough Low-Impedance Design Ensures Powerful Bass
Response with an Extremely Dynamic and Energetic Feel
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 both strong and uplifting.
Superior Quality Electronic Volume Control for Optimum
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. 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. 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.
Large Capacity Power Supply Unit Delivers Energetic,
Dynamic Sound with Fast Response
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
Symmetrical Design in Pursuit of Ideal Stereo
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.
Discretely 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
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 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.
Elegant Design with Luxurious Real Wood Panels
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.
Original Speaker Terminals Combine Ease of Use and Beauty
with High-Quality Sound
Our meticulous obsession with quality continues through to
the speaker terminals, which are the last and crucial link in the audio chain.
The screw-type terminals with originally-designed handles are created by
cutting pure brass. This enables a secure connection with no reduction in sound
quality. Contoured to the shape of human fingers, they not only look beautiful,
they can be turned easily and fastened tightly with minimal effort. They are
also compatible with connections that use banana plugs.
Remote Control with Simple Design and Superior Texture
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.
Maximum Power (4 ohms, 1kHz, 0.7% THD, for Europe)
160 W + 160 W
High Dynamic Power / Channel (8 / 6 / 4 / 2 ohms)
105 / 135 / 190 / 220 W
5 Hz - 100 kHz (+0 dB / -3 dB)
RIAA Equalization Deviation
20 Hz - 20 kHz (+ / - 0.5 dB)
Total Harmonic Distortion (CD to Sp Out, 20 Hz - 20 kHz)
Signal-to-Noise Ratio (CD)
100 dB (S: 200 mV)
Input Sensitivity (CD)
200 mV / 47 kilohms
Dimensions (W x H x D)
17-1/8" x 6-1/8" x 18-1/4"