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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





Sony STR-4800


Stereo Tuner/Amplifier
The STR-4800 combines a high performance stereo tuner and a powerful amplifier with a host of facilities which will be of great interest to the Hi-Fi enthusiast.

Features:
40 watts per channel
VHF/MW 
Combined oscillator and tuning capacitor for high stability and accuracy
Uniphase IF filter for high selectivity and low distortion
Phase lock loop stereo decoder for high channel separation and low distortion
Long linear tuning scate for ease of tuning
Tape 1 to tape 2 copying facility.

Specifications:
Rated Output:  40 watts per channel, both channels operating at 1 kHz into 8 Ω; 20 - 20,000 Hz , 35 watts
Power Bandwidth:  10 - 35,000 Hz
Total Harmonic Distortion:  less than 0,2% at 1 kHz; rated output power , 0,1% at 1 watt output power
Intermodulation Distortion:  less than 0,2% at rated output power, 0,1% at 1 watt output power
Residual Noise:  less than 0,1 µ watts at 8 Ω
Damping Factor:  10 - 35 Hz (8 Ω), 94 Ω) at 1 kHz
Input Sensitivity/Impedace: 
Phono 1, 2 :  2,5 mV/50 k Ω
Aux 1, 2 ;  250 mV/100 k Ω
Tuner :  250 mV/100 k Ω
Tape 1, 2 :  250 mV
Outputs level/Impedance:
Tape Rec 1, 2 :  250 mV/ 4,7 k Ω
Tape Rec/pb :  250 mV/ 4,7 k Ω
Headphone :  0,3 V into 8 Ω, 9 V into 10 k Ω
Frequency Response:
Phono  :  RIAA equalisation curve ±1 dB
Aux 1, 2 :  10 - 30,000 Hz ; +0,5 -3 dB
Tuner :  10 - 30,000 Hz ; +0,5 -3 dB
Tape, DIN :  10 - 30,000 Hz ; +0,5 -3 dB
Tone Controls:
Bass :  100 Hz ±10 dB
Treble :  10 kHz ±10 ddb
Filters:
High :  6 dB/oct above 6 kHz
Low :  6 dB/oct below 35 Hz
Loudness Control:  50 Hz +9 dB; 1 kHz =3 dB
Signal-to-Noise  Ratio:
Phono :  70 dB
Tape 1, 2 ;  90 dB
FM Tuning Range:  87,5 - 108 MHz (3,43 - 2,78 m)
Sensitivity:  1,9 µV IHF useable; 1,7 µV  S/N -26 dB
Capture Ratio:  1,5 dB
Selectivity:  80 dB (400 kHz)
Frequency Response:  40 -12,500 Hz +0,2 -1 dB; 30 - 15,000 Hz +0,2 -2 dB
Stereo Separation:  35 dB at 100 Hz; 40 dB at 1 kHz; 35 dB at 10 kHz
Aerial trminals:  300 Ω balance; 75 Ω unbalanced
Tuning Range MW:  530 - 1605 kHz (566 - 187 m)
Sensitivity:  250 µV/m external aerial at 1,000 kHz, 100 µV external aerial at 1,000 kHz
Aerial:  built in ferrite aerial; external aerial terminal
Circuit System:  Main Amp, Direct coupled SEPP system, tuner superheterodyne
Power requirements:  AC 110, 127, 220, 240 V (factory set 240 V, 50/60 Hz)
Dimensions (W x H x D):  490 x 170 x 415 mm (19-1/4" x 6-9/16" x 16-1/4")

Weight:  13,9 kg (30 lb 10 oz)
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