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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





Optonica RP-105H turntable


Optonica RP-105H
Fully-automatic Stereo Turntable with Double Direct Drive System
For superior performance, greater reliability and easier operation, electronic control systems are used throughout the RP-105H. Separate direct drive platter and tonearm motors assure extrastable platter rotation plus maximum tonearm trackability. An electronic servo control maintains platter speed precision, while a microprocessor controls the operation of the tonearm. When the unit is turned off, a solenoid supports the tonearm and locks it in place. Electronic control systems are also used to protect the stylus in case of power failure and to handle cuieing operations. The RP-105H also features remote control mode selection plus play/cue functions. The stylus is protected and extra operating procedures are eliminated by the auto record size/presence detector.


Specifications
Type:  full-automatic
Motor:  FG Servo motor
Drive System:  Direct-drive system
Turntable Platter :  aluminum die-cast
Platter Diameter:  300 mm
Speed:  33-1/3 and 45 rpm
Speed Control Range :  ±4%
Wow and Flutter:  ±0,06% (DIN 45 500);  0,04% WRMS (JIS C-5521)
Rumble:  47 dB (DIN A);  65 dB (DIN B)
Tonearm Type:  Static-balanced S-shaped tonearm
Effective length:  215 mm
Overhang:  16 mm
Off-Set-Angle:  23°
Cartridge Weight Range:  4 - 10 g
Stylus pressure Range:  1 - 3 g
Type:  Magnetic type
Output Level:  7 mV
Frequency Response:  20 Hz - 20 kHz
Channel Separation:  20 dB
Channel Balance:  3 dB
Recommended Load Impedance:  47 k Ω
Weight:  4,5 g
Recommended Stylus Pressure:  2 g
Power Source:  110, 20, 240 V 50/60 Hz AC
Power Consumption:  10 W
Dimensions (W x H x D):  430 x 120 x 355 mm
Weight:  7 kg


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