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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





Sony PS-X800 turntable

 

The Perfect Match - The Biotracer Tonearm and Tangential Tracking

The PS-X800 is designed for audiophiles and music lovers who will settle for nothing but the very best reproduction of music from their record collection. Careful attention was given to each detail of the PS-X800 to make it the new standard against which every other turntable will have to be measured.

Outstanding Features:

Tangential Biotracer tonearm for minimum distortion, excellent soni performance

Biotracer tonearm elicits the best performance from the widest variety of cartridges

Biotracer actively damps tonearm/cartridge resonance and achieves wide stereo separation

Biotracer controls tracking force, anti-skating and tonearm automatic functions

 


Tonearm

Advanced fully automatic operation is silent and responsive for total convenience

Automatic zero-balance for fast interchange of cartridges

Tonearm may be "indexed" left and right at high or low speed without lifting dust cover.

Feather-touch controls respond to the slightest finger contact for fast, effortless function selection

Automatic record-size selector permits precise and safe indexing

Audio muting circuit provides silence during start, return, and cueing phases

Luminous end-of-disc sensor frees the tonearm from mechanical linkages for improved reliability

Capable of operation in synchronization with selected Sony cassette decks using the optional Sony RM-65

Repeat mode for continuous music

Accepts universal headshells and cartridge/headshell combinations

 

Turntable

Quartz lock with Magnedisc servo control prevents even minute speed variations caused by external factors

The Sony Linear Torque BSL motor designed for uniform and smooth delivery

Of torque

Electromagnetic braking provides rapid and smooth half of platter rotation

Sony Bulk Molding Compound base is both rigid and acoustically inert to reduce feedback

Adjustable, gel-filled feet isolate turntable from external vibrations

 


The tangential Biotracer tonearm

The Sony PS-X800 is the first turntable to combine the advantages of tangetial tracking with the low-frequency performance of a stable tonearm foundation. Like other straight-line tracking turntables, the X800 uses a tonearm mounted on a moving platform. However, unlike any other tangetial arm in the world, the tonearm of the X800 incorporates Sony's innovative Biotracer design.

The Biotracer's automated Motional Feedback (MFB) system constantly senses and corrects for tonearm vibration. For this reason, the arm provides all the advantages of a solid foundation: full-bodied, detailed low frequencies. And you get the reduced distortion, and improved stereo separation associated with tangential tonearms.

 the Biotracer tonearm of the PS-X800 is the first design to fulfill the promise of straight-line tracking. Quite clearly, the combination of the Biotracer tonearm and the tangential configuaration results in a joyful musical experiance.

 


Uni-Motion design for superior precision

He tangential Biotracer arm provides still more benefits. Other straight-line tracking arms require some slight tracking error to keep the arm moving forward. These tonearms are in a constant state of correcting tracking error. In contrast, the PS-X800 incorporates Uni-Motion design. Uni-Motion brings the tonearm slowly towards the center of the record, even when no tracking error is detected. As a result, the tangetntial Biotracer maintains superior groove tangency. Phase differences between the stereo channels are dramatically reduced. This results in a stable stereo image, with outstanding spatial characteristics.

As a final measure of precision, the vertical tonearm bearings, so important to tonearm function, are made to extremely close dimensional tolerances. Situated in Sony's long-span pivot, they provide the final assurance of exquisite performance.

The PS-X800, with its Biotracer tonearm and straight-line tracking displays exceptionally lower distortion, extraordinary stereo separation and greatly improved reproduction of the inner grooves of all records,  most important, the Biotracer tonearm is unique in providing the solid, vibration-free tonearm base necessary for superior music reproduction.

 

Specifications

Operation Type: Fully-automatic

Tonearm

Type:  Tangential Biotracer

Effective Length:  180 mm (7-1/8 ")

Overhang:  0 mm (0 ")

Tracking Error:  ±0,05°

Usable Cartridge Weight (including headshell): 10 -17g; 16 - 23 g; 22 - 29 g

Supplied Headshell:  SH-156 (7.2)

Effective Mass (without cartridge): 

Turntable

Drive System Motor Direct, BSL - Yes

Magnedisc Servo Control - Yes

Quartz Lock, with Indicator - Yes

Wow and Flutter

WRMS :  0,025%

DIN-45507 :  ±0,03%

FG Direct Measurement:  0,015%

Signal-to-Noise Ratio (DIN-B): 78 dB

Speed Accuracy:  better than 0,003%

Start-up Time at 33-⅓ rpm:  1/2 rotation

Platter Diameter:  320 mm (12-5/8")

Platter Weight (with rubber mat):  1075 kg (3 lb 14 oz)

Speeds:   33-⅓ and 45 rpm

Electromagnetics Breaking:  Yes

Others

Power Requirements:  AC 120 V

Power Consumption:  45 Watts

Dimensions (W x H x D):  440 x 120 x 440 mm (17-5/16" x 4-3/4" x 17-5/16")

Weight:  11,6 kg (25 lb 10 oz)

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