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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





Rotel RT-930AX tuner


Rotel AM/FM Stereo Tuner RT-930AX
Specifications
FM Tuner Section
Usable Sensitivity:  12,8 dBf/1,2 µV (75 Ω )
50 dB Quieting Sensitivity:
Mono :  17,2 dBf/2 µV (75 Ω )
Stereo :  40,7 dBf/30 µV (75 Ω )
Signal-to-Noise Ratio (at 65 dBf):
Mono :  75 dB
Stereo :  70 dB
Total Harmonic Distortion (at 65 dBf)
Mono (1 kHz) : 0,08%
Stereo (1 kHz) :  0,3%
Frequency Response: 30 to 15,000 Hz ±1,5 dB
Capture ratio:  1,5 dB
Alternate Channel Selectivity:  63 dB (±400 kHz)
Spurious Response Ratio:  95 dB
Image Response Ratio:  65 dB
IF Response Ratio:  90 dB
AM Suppresion Ratio:  60 dB
Stereo Separation:
100 Hz / 1 kHz / 10 kHz :  35 dB / 40 dB / 30 dB
Subcarrier Product Ratio:  60 dB
SCA Rejection Ratio:  70 dB
Output Level :  720 mV
Antenna Input:  75 Ω  unbalanced
AM Tuner Section
Sensitivity
AM :  350 µV/m
LW :  750 µV/m
Selectivity
MW :  27 dB
LW :  25 dB
Signal-to-Noise Ratio
MW :  55 dB
LW :  55 dB
Image Response Ratio
MW :  40 dB
LW :  40 dB
IF Response Ratio
MW :  60 dB
LW :  60 dB
Antenna:  Loop Antenna
Miscellaneous
Power Requirement:  120 V, 220 V, 240 V; 50/60 Hz
Power Consumption:  10 watts
Dimensions (W x H x D):  440 x 72 x 257 mm (17-3/8" x 2-7/8" x 10-1/8")
Weight:  3,2 kg (7,04 lbs)


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