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
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