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





Marantz ST-320

 Marantz ST-320  (1982)
AM/FM analogue tuner. Illuminated dial window. 3 LED's for optimal tuning and 5 LED's for signal strength indication. Pilot frequency rejection filter. AM detachasble loop antenna. 
 This model is also available with long waves as ST 320L.
Specifications
FM Section
Frequency Range:  87,5 - 108 MHz
Sensitivity:
DIN Mono (S/N 26 dB) :  1,8 µV (300 Ω)
DIN Stereo (S/N 46 dB) :  60 µV (300 Ω)
Selectivity Adjacent Channel 98 MHz:  65 dB
Image Frequency Rejection:  55 dB
Intermediate Frequency Rejection:  80 dB
Spurious Response:  85 dB
AM Suppression:  47 dB
Signal-to-Noise Ratio (DIN)
Unweighted [Mono/Stereo] :  70 / 60 dB
Weighted [Mono/Stereo] :  70 / 65 dB
Pilot Frequency relection 19 kHz :  62 dB
Carrier Frequency Rejection 38 kHz :  65 dB
Total Harmonic Distortion:
Mono :  0,25%
Stereo :  0,4%
Frequency Response :  30 Hz - 15 kHz (+0 -1 dB)
Stereo Separation:  40 dB
Channel Balance:  0,2 dB
MW Section
Frequency Range:  522 - 1611 kHz
Sensitivity (S/N 20 dB 30% mod. 1 MHz):  10 µV
Selectivity (1 MHz ±9 kHz):  30 dB
Image Rejection at 1 MHz:  45 dB
Intermodulation Frequency Rejection at 1 MHz:  40 dB
Signal-to-Noise Ratio at 1 MHz:  50 dB
Total Harmonic Distortion at 1 MHz:  0,3%
LW Section
Frequency Range:  153 - 360 kHz
Sensitivity (S/N 20 dB 30% mod. 250 kHz):  90 µV
Image Rejection at 250 kHz:  30 dB
Intermodulation Frequency Rejection at 250 kHz:  60 dB
Signal-to-Noise Ratio at 250 kHz:  48 dB
Power Requirement:  110-220 / 220-240 V, 50/60 Hz
Dimensions (W x H x D):  416 x 55 x 190 mm
Weight:  2,4 kg

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