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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





Yamaha PX-2 and PX-3

Yamaha PX-3
Natural Sound Linear Tracking Turntable
Yamaha technology allows the PX-3 to take full advantage of the linear tracking design to deliver truly natural music reproduction. The Yamaha linear tracking system virtually eliminates tracking error and inside force for greatly reduced distortion, minimum crosstalk, and exceptional stereo imaging. Like the PX-2, the PX-3 also incorporates a straight perfectly symmetrical, optimum mass tonearm and quartz-lock PLL-servodirect drive system. This turntable is a pleasure to operate, as well, thanks to a specially developed Yamaha logic LSI which provides extensive control convenience and flexibility. Operation is fully automatic, with two-speed tonearm positioning and repead capabilities also included.

Specifications:
Tonearm Section
Arm Type:  Linear tracking arm
Servo System:  Photo-electric tracking sensor plus servo motor
Total length:  236 mm (9=9/32")
Effective Length:  190 mm (7-15/32")
Tracking Force Device:  Static balance type sliding weight system 0 - 2,5 g , in 0,1g steps
Effective mass:  proportional type to tracking force 17,0 g (when tracking force 1,5 g) in cartridge-less state
Applicable Cartridge Weight Range:  0,5 - 11 g (using sub-weights) 10 - 16 g
Maximum Horizontal Tracking Error Angle:  ± 0,15°
Arm Lifter:  Oil damp type cueing
Adjustable Range of Arm height:  ±4,0 mm
Headshell:  Pure, forged aluminum (Plug-in conforming to EIA Standards )
Headshell Weight:  8,0 g
PU Cable:  Neglex 2496 Low-impedance, double cylindrical cord
Capacitance :  130 pF
Resistance:  1 Ω
Cartridge:  replaceable ( non provided)
Rotary Section
Motor:  DC, 4-phase, 8-pole coreless Hall motor
Drive System:  Drirect-drive
Servo System:  Quartz PLL
F.G. :  Total circumference integrating type
Speed (with Lock Indicator):  33-1/3, and 45 r.p.m.
Platter:  300 mm (12")  diameter, aluminum die-cast
Platter Weight:  1,6 kg (3,8 lbs) including rubber mat
Moment of Inertia:  210 kg/cm² (including rubber mat)
External Design
Cabinet:  BMC (Bulk Molding Compound)
Dust Cover:  Acrylic, 4 mm thick, weighing 1,1 kg. Front operating type
Hinges:  Detacgable type
Insulator:  Combination of spring-and-rubber type with height adjustment
Control Section
Automatic Functions:
Auto-Lead-In
Auto-Return
Auto-Repeat
Auto-Cut
Auto-Up (During Power-OFF)
Size Selector:  17/30 cm (7"/12")
Manual Functions:  Arm-Up; Arm-down; Left & Right 2-speed feeding
General
Signal-to-Noise Ratio:  77 dB (IEC 98A weighted)
Wow and Flutter:  0,015% WRMS (FG direct)
Power Supply/Consumption
USA, Canda : 120 V AC, 60 Hz / 27 W
Europe :  220 V AC, 50 Hz / 27 W
Australia, British :  240 V AC, 50 Hz / 27 W
General Model :  110/120/220/240 V AC, 50/60 Hz
Dimensions (W x H x D) :  469 x 149 x 428 mm (18-1/2" x 5-7/8" x 16-27/32")
Weight:  12 kg (26,4 lbs)





Yamaha PX-2
Natural Sound Linear Tracking Turntable

The PX-2 employs a highly sophisticated linear tracking mechanism which enablos it to actually achieve the linear tracking ideal: precisely recreating the movement of the head which originally cut the record. Truly accurate, faithful sound reproduction has finally become possible. This mechanism, combined with yamaha's symmetrically balanced, optimum mass, straight tonearm and quartz-lock PLL-servo direct drive system, provides unparalleled turntable performance. Operating convenience is also far above average, with two-speed tonearm positioning, one-touch disc size selection/play initiation, repet function, and IC logic controls.


Turntable (Rotary) Section
Drive System:  Quartz PLL/FG (Full Periphery Integration) Servo with Electronic Braking, Drirect-drive
Motor:   4-phase, 8-pole Coreless DC Hall-Effect motor
Servo System:  Quartz PLL
Speeds:  33-1/3, and 45 r.p.m.
Platter:  310 mm (12-1/2")  diameter, aluminum diecast
Platter Weight:  2,1 kg (4 lbs, 10 oz) including rubber mat
Moment of Inertia:  270 kg/cm² (including rubber mat)
General
Signal-to-Noise Ratio:  80 dB (DIN B / IEC 98A weighted)
Wow and Flutter:  0,01% WRMS (FG direct)
Power Supply/Consumption
USA, Canda : 120 V AC, 60 Hz / 25 W
Europe :  220 V AC, 50 Hz / 25 W
Australia, British :  240 V AC, 50 Hz / 25 W
General Model :  110/120/220/240 V AC, 50/60 Hz  / 25W
Dimensions (W x H x D) :  493 x 156 x 428 mm (19-3/8" x 6-1/8" x 16-7/8")
Weight:  17 kg (37 lbs 8 oz)




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