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-A30L

 FM Stereo, FM/AM Superheterodyna Tuner Acute Servo Lock System
Specifications
Tuning Range:  87,5 - 108 MHz
Antenna Terminals:  300 Ω balanced and 75 Ω unbalanced
Intermediate Frequency:  10,7 MHz
Sensitivity at 46 dB Quieting (40 kHz deviation): 
Mono :  3,5 µV, 16,1 dBf
Stereo :  40 µV, 37,3 dBf
Usable Sensitivity: 
40 kHz deviation :  1,3 µV, S/N =26 dB
IHF :  1,8 µV, 10,3 dBf
Limiting Threshold:  1 µV (-3 dB)
Signal-to Noise Ratio (40 kHz deviation)
Mono :  65 dB
Stereo :  60 dB
Harmonic Distortion:
At 100 Hz [mono/stereo] :  0,15% / 0,4%
At 10 kHz  [mono/stereo] :  0,15% / 0,4%
At 10 kHz [mono/stereo] :  0,3% / 0,6%
IM Distortion (40khz deviation):
Mono :  0,15%
Stereo :  0,4%
Separation
35 dB at 100 Hz
45 dB at 1 kHz
32 dB at 10 kHz
Frequency Response:  40 Hz - 12,5 kHz ±1 dB
Selectivity:  50 dB at 300 kHz; 75 dB at 400 kHz
Capture Ratio:  1,0 dB
AM Suppression Ratio:  55 dB
Image Response ratio:  50 dB
IF Response Ratio:  95 dB
Spurious response Ratio:  75 dB
RF Intermodulation:  60 dB
Sub-carrier product Ratio:  50 dB
Muting Threshold:  approx 5 µV
Output Level / Impedance:  750 mV, 46 k Ω (at 75 kHz deviation)

MW Section
Tuning Range:  522 - 1602 kHz
Antenna :  built-in and External
Intermediate Frequency:  450 kHz
Usable Sensitivity:
Built-in Antenna :  250 µV /m (1,000 kHz)
External Antenna :  100 µV (1,000 kHz)
S/N Ratio:  50 dB (50 mV/m)
Harmonic Distortion:  0,5% (500 mV/m)
Selectivity:  45 dB (9 kHz)
Image Response Ratio:  45 dB (1,000 kHz)
IF Response Ratio:  40 dB (1,000 kHz)

LW Section
Tuning Range:  155 - 344kHz
Antenna :  built-in and External
Intermediate Frequency:  450 kHz
Usable Sensitivity:
Built-in Antenna :  500 µV /m (250 kHz)
External Antenna :  100 µV (250 kHz)
S/N Ratio:  50 dB (50 mV/m)
Harmonic Distortion:  0,5% (500 mV/m)
Selectivity:  45 dB (9 kHz)
Image Response Ratio:  75 dB (250 kHz)

Power Requirements:  220 - 240 V 50/60 Hz
Power Consumption:  7 W
Dimensions (W x H x D):  430 x 80 x 275 mm (17" x 3-1/4" x 10-7/8")

Weight: 3,6 kg (7 lb 15 oz) Net

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