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

Sansui SR-2020BC

 Two-Speed Belt-Drive Manual Turntable
Sansui's most economical turntable, the SR-2020BC has been designed for use in any medium to small stereo system. It brings many of the refinements of Sansui's higher quqlity turntables within the price range of everyone; the direct belt-drive system, the quality tubular type static-balanced tonearm, the unique hydraulic cuing device, and many others.
 Featuring a large aluminum cast double rimmed platter and an induced magnetic type cartridge, the SR-2020BC brings a whole new standard of performance into the inexpensive turntable field.
Accessory Equipment:  Delay-motion oil-damped arm lifter which is controlled by the power swich lever. Stylus pressure direct reading weight

Subweight for compensation the weight of cartridge used. Plug-in spare headshell. Anti-howling insulators.
Turntable:  aluminum alloy diecast double rim platter.
Platter Diameter / Weight:  12" / 2,4 lbs
Drive Motor:  4-pole hysteresis synchronous capacitor-starting motor
Speed:  33 and 45 rpm
Signal-to-Noise Ratio:  better than 45 dB
Wow and Flutter:  less than 0,2%
Speed-Change: speed are changed by pushing a speed selector which shifts the belt
Tonearm: Static-balanced tubular arm
Tracking Error:  less than ±1°
Stylus pressure:  0 to 2,5 grams (direct reading gram-scale with ½ gram markings)
Carteidge:  induced magnet type
Frequency Response:  15 - 20,000 Hz
Output Balance:  less than 1,5 dB
Channel Separation:  better than 30 dB at 1,000 Hz
Output Voltage:  5 mV
Standard Load Resistance:  50 k Ω
Standard Stylus Pressure:  1,5 to 2 grams
Stylus Compliance:  17 x 10¯⁶ cm/dyne
Stylus:  0,5 mils diamond spherical
Wood Base:  Wlnut open-pore finish with molded acrylic dust cover
Power Requirement / Consumption:  100 (20 VA); 117 V (19 VA); 230 V (18 VA), 50/60 Hz
Dimensions (W x H x D):   20½ " x 7" x 14
Weight:  17,6 lbs

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