What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Yamaha A - S3000 (New classic)

Meticulously designed and beautiful in appearancejust like a musical instrument
As befits a top-end audio component, the A-S3000 gives off the presence of a fine musical instrument, with absolutely no screws or fasteners that can be seen from the outside. Every single aspect of its construction and design exudes master craftsmanship and reflects an obsession with quality—a truly musical quality possible only for Yamaha, a world class musical instrument manufacturer. The amplifier with its refined design has been meticulously finished by the skillful use of advanced processing technologies: integrating the top panel and side wood connection, leaving no gaps while using different materials—metal and wood—for the connection.

Rigid Streamlined Construction provides strict anti-vibration protection, 
and enables shortest cabling routes
The A-S3000 has adopted a newly designed highly rigid double structure construction in order to achieve profoundly pure and accurate audio amplification. The bottom chassis and insulator ward off external vibration, and provide each circuit board a floating structure supported by an independent inner frame, thoroughly eliminating the impact of vibration. And the power source unit, which consists of a power transformer and capacitors, which are major sources of internal vibration, is fixed firmly with a three-dimensional structured inner frame, and is supported solidly by the front panel and the rear panel. The power amp circuit board and the weighty heat sink are attached to the left and right inner frames. The power supply unit and amplifier circuits are thus structurally isolated, achieving an ideal chassis structure which thoroughly blocks the transmission of vibration. Moreover, the inner frame that supports the power transformer is shaped with ample space below it, allowing passage of the wiring to each circuit over the shortest possible route. The newly developed chassis with this innovative structure helps to minimise the length of the signal paths and achieve low impedance, as well as providing high rigidity and anti-vibration benefits. The result is a dramatic reduction in signal loss, for remarkably pure audio amplification.

Left-right symmetrical design for independent pre amp and power amp blocks
The amplifier circuit design features independent pre amp and power amp blocks, and perfect left-right symmetry. Separation of the pre amp, which handles low energy signals, from the power amp, which handles high-energy amplified signals, greatly reduces sound deterioration caused by mutual interference. Moreover, the left-right symmetrical design, which keeps the left and right power stages completely separate, ensures greater channel separation and enhances clarity of the stereo image.

 Exquisite, large level meters reflect the dynamics in the music
Floating and Balanced Power Amplifier with MOSFETs
All-stage balanced transmission
Direct drawing toroidal transformer for complete elimination of signal transmission loss
Exceptionally low impedance through secure screw connections
Superior quality electronic volume control for optimum sound
Discretely configured phono amp
Large toroidal transformer, solidly mounted with independent three-dimensional inner frame
Comprehensive low impedance design, shortened signal paths and copper-plated chassis
Six mm thick top panel made of non-magnetic aluminium plate
Insulators allow use of spikes or pads
Original speaker terminals for high sound quality, as well as beauty and ease of use
Obsessive, meticulous switch design— elaborate, richly textured, easy-to-use
Remote control with simple design and superior texture

Technical Specifications for A-S3000
Rated Output Power
(8 Ω, 20 Hz to 20 kHz, 0.07% THD):  100 W + 100 W
(4 Ω, 20 Hz to 20 kHz, 0.07% THD)150 W + 150 W
Dynamic Power (IHF)
(8 Ω) : 120 W + 120 W
(6 Ω) : 150 W + 150 W
(4 Ω) : 200 W+ 200 W
(2 Ω) : 300 W + 300 W
Dynamic Headroom (8 Ω) : 0.79 dB
Maximum Output Power [U.K. and Europe models only] (4 Ω, 1 kHz, 0.7% THD):  170 W + 170 W
Maximum Effective Output Power (JEITA) [Taiwan, China, Korea, Asia and U.K. models only]
(8 Ω, 1 kHz, 10% THD):  130 W + 130 W
(4 Ω, 1 kHz, 10% THD):  210 W + 210 W
IEC Output Power [U.K. and Europe models only] (8 Ω, 1 kHz, 0.02% THD):  105 W + 105 W
Maximum Power (JEITA) [Taiwan, China and Asia models]
(8 Ω, 1 kHz, 10% THD):  120 W + 120 W
(4 Ω, 1 kHz, 10% THD):  190 W + 190 W
Power Bandwidth (MAIN L/R, 0.1% THD, 45 W, 8 Ω):  10 Hz to 60 kHz
Damping Factor  (1 kHz, 8 Ω)250 or higher
Maximum Input Signal Voltage
PHONO MM (1 kHz, 0.003% THD) : 50 mVrms
PHONO MC (1 kHz, 0.003% THD) : 2.3 mVrms
CD, etc. (1 kHz, 0.5% THD) : 2.80 Vrms
BAL 1/BAL 2 (1 kHz, 0.5% THD)
(BYPASS) : 2.80 Vrms
(ATT. -6 dB) : 5.60 Vrms
Rated Output Voltage/Output Impedance
REC OUT :  200 mVrms/1.5 kΩ
PRE OUT :  1.0 Vrms/1.5 kΩ
Frequency Response
CD, etc. (5 Hz to 100 kHz) :  +0/3 dB
CD, etc. (20 Hz to 20 kHz) +0/0.3 dB
RIAA Equalization Deviation
PHONO MM  ±0.5 dB
PHONO MC  ±0.5 dB
Total Harmonic Distortion
PHONO MM to REC OUT (20 Hz to 20 kHz, 1.2 Vrms) :  0.005%
PHONO MC to LINE 2 REC (20 Hz to 20 kHz, 1.2 Vrms) :  0.02%
BAL 1/BAL 2 to SPEAKERS  (20 Hz to 20 kHz, 50 W/8 Ω):  0.025%
CD, etc. to SPEAKERS  (20 Hz to 20 kHz, 50 W/8 Ω):  0.025%
Signal to Noise Ratio (IHF-A Network)
PHONO MM (5 mVrms, Input shorted) :  93 dB
PHONO MC (500 μVrms, Input shorted):  85 dB
CD, etc. (200 mVrms, Input shorted) :  103 dB
Residual Noise (IHF-A Network) :  33 μVrms
Input Sensitivity/Input Impedance
CD, etc. :  200 mVrms/47 kΩ
PHONO MM :  2.5 mVrms/47 kΩ
PHONO MC :  100 μVrms/50 Ω
MAIN IN :  1 Vrms/47 kΩ
BAL 1/BAL 2 :  200 mVrms/100 kΩ
Headphone Jack Rated Output Power CD, etc. (1 kHz, 32 Ω, 0.2% THD):  70 mW + 70 mW
Channel Separation CD, etc. (Input, 5.1 k Ω Terminated, 1 kHz/10 kHz) :  74/54 dB or higher
PHONO MM (Input shorted, 1 kHz/10 kHz, Vol.:30 dB):  90/77 dB or higher
PHONO MC (Input shorted,1 kHz/10 kHz, Vol.:30 dB):  66/77 dB or higher
Tone Control Characteristics
Boost/Cut (50 Hz) :  ±9 dB
Turnover Frequency :  350 Hz
Boost/Cut (20 kHz) :  ±9 dB
Turnover Frequency :  3.5 kHz
Power Supply
[U.S.A and Canada models]:  AC 120 V, 60 Hz
[Taiwan model]AC 110 V, 60 Hz
[China model] :  AC 220 V, 50 Hz
[Korea model] :  AC 220 V, 60 Hz
[Australia model] :  AC 240 V, 50 Hz
[U.K. and Europe models]:  AC 230 V, 50 Hz
[Asia model] :  AC 220 - 240 V, 50/60 Hz
Power Consumption
[U.S.A and Canada models] :  500 VA
[Other models] :  350 W
Standby Power Consumption :  0.3 W
Dimensions (W × H × D):  435 × 180 × 464 mm (17-1/8 × 7-1/8 × 18-1/4)
Weight:  24.6 kg (54.2 lbs)

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