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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





JVC JA-S41


With th enew integrated stereo amplifier, JVC introduces the new circuit design in the often-negleted power supply of an amplifier. Adding no extra cost, our design improves dynamic characteristics of the amp, reduces distortion and increases power dynamics at one-channel driving.
The JA-S41 is the first of JVC's new line of amplifiers incorporating twin power supplies, one for the Class-A operated preamplifier circuits (phono equalizer, tone control circuit and predriver circuit) and the other for the Class-B operated power-amplifier circuit. JVC technology has at last perfected a way to solve the so-called "dynamic crosstalk distortion"  problem. Pulsive and transient signals applied to the power amplifier cause no tonal degradation, i.e. no loss of definition, no increase in distortion and no lack of brilliance.

Yet in caomparison with competititors' integrated amps using two separate power supplies, one for each channel, our new technology adds very little to cost but nevertheless performs better, reducing "soft" distortion and increasing power when only one channel is driven.
You'll know the JVC difference when you hear it; A/B between the JA-S41 and other similarly-prieced models. Add such features as a big 60-watts per channel power, ICL phono equalizer, twin-pot volume control and front-panel tape terminals and the all-new JVC JA-S41 is a truly sophisticated hi-fi amplifier.

Specifications:
Power Output:  65 W + 65 W ( 20 Hz- 20,000 Hz into 8 Ω, T.H.D. 0,05%)
Total Harmonic Distortion:  0,02% ( at 65 W)
Input Sensitivity/Impedance
Phono :  2,5 mV / 47 k Ω
RIAA Equalization:  20 Hz - 15 kHz ±0,5 dB
PhonoMax. Input:  200 mV (RMS - 1 kHz)
Signal-to-Noise Ratio (IHF-A): 
Phono :  75 dB
Power Consumption:  160 W
Dimensions (W x H x D):  390 x 152 x 330 mm
Weight:  10,2 kg


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