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





Sony ST-S707 ES

 FM Stereo FM/AM Tuner Features:
Radial Power Supply Circuit
Direct Comparation
FM - MW tune bands
40 Preset stations programm.
Station Name Display
Multi process Memory
Digital Signal Meter
Digital Dial Tuning
Golden or Black version with side wood panel
Specifications:
FM Tuner
Frequency Range:  87,5 - 108 MHz
Antenna Terminals:  75 Ω unbalanced
Intermediate Frequency:  10,7 MHz
Sensitivty:
Mono (S-N 26 dB) :  10,3 dBf (0,9 µV)/75 Ω
Stereo (S-N 46 dB) : 38,5 dBf (23 µV)/75 Ω
Usable Sensitivity (IHF) :  10,3 dBf (0,9 µV)/75 Ω
Signal-to-Noise Ratio(at 40 kHz deviation):
Mono :  95 dB
Stereo :  86 dB
Harmonic Distortion:
Wide :  0,008% [mono]; 0,02% [stereo]
Narrow :  0,04% [mono]; 0,07% [stereo]
Frequency Response:  15 Hz - 15 kHz ±0,2 dB
Separation:  65 dB at 1 kHz
Selectivity (at 400 kHz):
Wide :  80 dB
Narrow :  90 dB
Selectivity (at 300 kHz):
Wide :  45 dB
Narrow :  70 dB
Output (at 40 kHz deviation):  600 mV
AM Tuner
Frequency Range:
Continental Europe : 
MW :  531 - 1602 kHz (9 kHz step)
LW :  153 - 279 kHz (1 kHz step)
Outside Europe:
AM :  531 - 1602 kHz (9 kHz step)
530 - 1710 kHz (10 kHz step)
Intermediate Frequency:  450 kHz
Usable Sensitivity (with AM loop antenna):
MW :  300 µV/m
LW :  1 mV/m
Signal-to-Noise Ratio:
54 dB (50 mV/m, 999 kHz)
50 dB (50 mV/m, 216 kHz)
Harmonic Distortion:  0,3% (50 mV/m, 400 Hz)
Selectivity:
Wide :  50 dB
Narrow :  65 dB
General
Power requirements: 
Continental Europe :  220 -230 V AC 50/60 Hz
Outside Europe:  110 - 120 V AC 0r 220 - 240 V AC, 50/60 kHz
Power consumption:  20 W
Dimensions (W x H x d):  470 x 96 x 372 mm (18-3/8 x 3-7/8 x 14-3/4 inches)
Weight:  approx>  6,4 kg (14 lbs 2 oz)

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