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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





Akai AP-D30

 The Akai model AP-D30 record player is a precision instrument of Hi-fi quality which will satisfy even the most demanding music lover. This turntable can be used for stereo as well as monophonic listening. The direct  drive offers high transmission accuracy with low wow & flutter and rumble.
Specifications
Turntable: Aluminum alloy die cast
Drive System and Mechanism:  Direct-Drive, Auto-Return
Motor:  DC  Servo Motor
Speed and Pitch Control:  33 and 45 rpm  ±5%
Wow and Flutter:  0,05% (DIN); 0,035% (JIS)
Rumble:  45 dB (DIN-A); 70 dB (DIN-B); 45 dB (JIS)
Tone-arm: Static balanced
Effective Arm Length:  220 mm
Stylus Pressure Adjustment Range: 0 to 3 grams
Applicable Cartridge Weight:  4 to 12 grams
Arm Lifter:  oil damped
Overhang:  15 mm
Offset Angle:  22°30'
Horizontal Tracking Error Angle:  +3° 5';  -1° 13'
Shell Weight:  8,2 grams
Cartridge:  VM (Dual Maving Magnet) type
Output Voltage:  5 mV (DIN 45541)
Channel Separation:  More than 20 dB (DIN 45541)
Optimal Stylus Pressure:  2 grams
Static Vertical Compliance:  17,7 x 10¯⁶ cm/dyn
Static Horizontal Compliance:  29,1 x 10¯⁶ cm/dyn
Power Requirements:  110-120 / 220-240 V, 50/60 Hz
Dimensions (W x H x D):  440 x 140 x 403 mm ( 17,3 x 5,5 x 15,8 inch)
Weight:  5,5 kg (12,1lbs)

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