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





Pioneer SA-606 (1978)



Specifications
Amplifier section
Circuitry:  1-st stage current mirror loaded differential amplifier, constant current loaded all-stage direct-coupled OCL.
Continuous Power Output:  40 watts per channel (8 ohm from 20 Hz to 20 kHz, 0,05% THD)
Total Harmonic Distortion 20 Hz to 20 kHz from AUX):
Continuous rated output: No more than 0,05%
20 watts per channel power output, 8 ohms: No more than 0,3%
1 watt er channel power output, 8 ohms: No more than 0,03%
Intermodulation Distortion (50 Hz:7,000 Hz = 4 : 1):
Continuous rated output: No more than 0,05%
20 watts per channel power output, 8 ohms: No more than 0,2%
1 watt er channel power output, 8 ohms: No more than 0,02%
Output Speaker:  A, B, A+B
Damping Factor (8 ohm from 20 Hz to 20 kHz):  30
Input Sensitvity/Impedance:
Phono : 2,5 mV/50 kΩ
Tuner : 150 mV/50 kΩ
AUX : 150 mV/50 kΩ
Tape Play : 150 mV/50 kΩ
Phono Overload Level ( THD 0,05%, 1 kHz):  180 mV
Output Level/Impedance:
Tape Rec (DIN) : 30 mV/80 kΩ
Frequency Response:
Phono (RIAA Equalization): 20 Hz - 20 kHz ±0,3 dB
Tuner, AUX, Tape Play:  20 Hz - 40 kHz ±2 dB
Tone Control:
Bass : +12 dB, -10 dB (100 Hz)
Treble : +10 dB, -10 dB (10 kHz)
Loudness Contour (Volume control set at -40 dB):  +6 dB (100 Hz), +3 dB (10 kHz)
Hum and Noise (DIN, continuous power/50 W):
Phono : 58/66 dB
 AUX,  : 60/95 dB
Semiconductors:  2 x ICs, 25 x Transistors, 27 x Diodes
General
Power Requirements:  120 V - 240 V 50/60 Hz
Power Consumption:  420 W, Dimensions ( W x H x D):  420 x 147 x 261 mm (16-9/16 x 5-13/16 x 12-7/8 in)
Weight:  7,5 kg (16 lb 9 oz) net

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