Sony PS-X700 turntable

The Biotracer Tonearm in a Popular Format

The exquisite performance of the Biotracer tonearm plus the ability to use universal-mount headshells and integrated cartridge/headshell combinations make the PS-X700 a popular choice for a large number of music lovers.

Outstanding Features

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

Biotracer actively damps tonearm resonance and achieves wide stereo separation

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

Automatic zero-balance for fast interchange of cartridges

Digital readout of stylus force

Tonearm and Functions

Tonearm accepts universal headshells as well as cartridge/headshell combinations

Adjustable tonearm height for optimum tracking without added mass of cartridge shims

Advanced fully-automatic operation is silent and responsive for total convenience

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 and-of-disc sensor frees the tonearm from mechanical linkages for improved sensitivity

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

"repeat" mode for continuous music

 

Drive System Technology

The Sony Linear Torque BSL motor for smooth, precise rotation

Most direct-drive motors generate their power with an array of electromagnets mounted in a circle within a rotor ring. As the rotor turns, the torque increases and decreases as a result of the spaces  - "slots" - between the electromagnets. The wavering-force effect is called "cogging". Sony has eliminated cogging with the remarkable BSL motor. There are no brushes, no slots, and the magnetic force is constant. Cogging is impossible, and the torque delivered to the platter is uniform, smooth, and even. As a further benefit, the Sony brushless design makes the BSL motor unusually quiet, durable and trouble-free.

 

Magnetic servo control for superior accuracy.

Because household voltage itself is not without fluctuations, no direct-drive motor can be depended on - by itself - to maintain absolutely constant speed. Most good direct-drive turntables, therefore, have introduced servo electronics, which monitor the speed at which the motor turns and adjust the electrical input to correct for deviations.

Most servo systems depend on a generator, mounted within or below the motor, to monitor motor speed and feed that information back to the control circuits. High-quality turntables use pulse frequency generators for improved accuracy. These Sony turntables are better still. They offer markedly increased accuracy. These Sony turntables are better still. They offer markedly increased accuracy with the Magnedisc system, which monitors the turning speed, not at the motor, but at the outer rim of the platter where there is room for many more pulses. Based on Sony-developed technology for computer-controlled precision machinery, this system uses a magnetic pickup head to read the 512 pulses imprinted on the platter's outer rim. The information is relayed to the servo control so rapidly and precisely that any speed variation is corrected before it can affect the musical signal.

 

Specifications

Turntable

Platter:  320 mm (12-5/8-inch) aluminum-alloy diecast

Motor:  Linear torque BSL (brushless and slotless) motor

Drive System:  Direct drive

Control System:  Quartz lock control, magnedisc servo control system

Speed :  33-⅓ and 45 rpm

Starting Characteristics:  Comes to nominal speed within a half revolution (33-⅓ rpm )

Wow and Flutter:  0,015% (WRMS)

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

Load Characteristics:  0% up to 150 g stylus force (at lead-in groove of a record)

Speed Deviation:  Within ±0,003%

Automatic System:  lead-in, return, reject, repeat, record size selection, tonearm balance

Tonearm

Type:  Electronic universal tonearm

Pivot-to-stylus Length:  235 mm (9-3/8")

Overall Arm Length:  315 mm (12-1/2")

Overhang:  13 mm (1/2")

Tracking Error:  +2°40' to -1°40'

Stylus Force Adjustment Range:  0,5 - 3,0 g (electronic adjust,)

Cartridge Shell Weight:  7,7 g

Cartridge Weight Range (including supplied shell):  9,7 - 16,7 g (15- 22,7 g with extra weight)

Height Adjustment Range:  within 6 mm

General

Power Requirements:  120 V AC, 220 - 240 V, 50/60 Hz

Power Consumption:  12 W

Dimensions (W x H x D):  480 x 165 x 420 mm (19" x 6-1/2" x 16-5/8")

Weight:  12,5 kg (27 lbs 9 oz) Net