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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





Pioneer SX-850


Pioneer SX-850 Features:
Refined Design and Operation Features
Power Supply and Protection Of Power Amplifier
Hign Class Equalizer And Control Preamplifier
AM (Long and Medium Wave) Reception
FM Muting
Multiplex (MPX) Circuit
FM Front End and FM IF Section



Because it enables you to enjoy both the joys of records and of the numerous musical programmes broadcast on the air in mono and stereo, the receiver is by far the most convenient piece of hi-fi equipment. It is no coincidence that Pioneer is particulary reputed for this type of equipment, the refinement, performance and sturdiness of Pioneer receivers is almost legendary.  Ask one of the thousands of audiophiles already equipped with even an old Pioneer receiver and you'll be convincend. The range of Pioneer receivers is particulary wide.  As many 12 models, including the two stereophonics, from 2 x 65 watts for the SX-850 up to the  SX-950 with a 2 x 85 watts.



Specifications  SX-850
Audio Section
Continuous power:
2 x 85 W  (both channel driven at 20 Hz - 20 kHz, 4Ω)
2 x 65 W  (both channel driven at 20 Hz - 20 KHz, 8Ω)
THD at rated output power  (DIN), 8Ω:  0,1%
Power bandwidth (DIN) both channel driven 8Ω:  5 Hz - 45 kHz
Frequency response at AUX input (DIN):  10 Hz - 50 kHz (+0 dB, -1 dB)
Input sensitivity impedance:
Phono:  2,5 mV/50 kΩ
Microphone:  6,5 mV/50 kΩ
Tape monitor, Tuner, Aux:  150 mV/100 kΩ
Bass control (100 Hz):  ±10 dB
Treble control (10 kHz):  ±10 dB
FM Section (87,5 to 108 Hz)
Sensitivity (DIN):
Mono  (26 dB S/N ratio):  1,6 μV
Stereo (46 dB/S/N ratio):  44μV
Capture ratio: 1 dB
Selectivity (±400 kHz):  80 dB
S/N ratio (IHF):  72 dB
THD (stereo) 1kHz (DIN):  <0,3%
Frequency response (DIN):  30 Hz - 15 kHz (+0,2 dB, -2 dB)
Stereo separation 1 kHz (DIN):  40 dB
Subcarrier suppression:  62 dB
AM Section (525 - 1605 kHz)
Sensitivity (IHF):  15 μV/m
Selectivity:  35 dB
Dimensions (W x H x D):  526 x 173 x 412 mm
Weight:  19,1 kg


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