The Sony Semi-automatic turntable
PS-LX4 are automatic return turntables with a full array of features and flawlessly smooth performance at modest cost.
Outstanding Features
Straight Duralumin tonearm for low mass and excellent tracking
Two-point tonearm support for high rigidity and low modulation noise
Tonearm and Functions
Semi-automatic system returns tonearm at end of play and shuts off motor
Front controls provide convenient operation - even with the dust cover closed
Record-setting guides make it easy to place the record precisely on the spindle
Turntable and Construction
Quartz lock prevents even minute speed variations caused by external factors
The Sony Linear Torque BSL motor designed for uniform and smooth delivery of torque
Magnedisc servo control monitors speed at the outer rim of platter for exceptional accuracy
Electromagnetic braking provides rapid and smooth half of platter rotation
Sony Bulk Molding Compound base is both rigid and acoustically inert to reduce feedback
The PS-LX4 direct-drive turntable deliver exceptional performance. Both models incorporate Sony's straight, low-mass tonearm, also found on several other Sony models. It is obvious, that a turntable's tonearm is critical to performance
A tonearm must be rigid. Yet some cartridges only function properly with a low-mass tonearm. These seemingly contradictory requirements - high rigidity and low mass - have been met by the design and materials of the straight, low-mass tonearm. The shaft of this tonearm is supported in two places; behind and in front of the vertical bearings. This two-point suspension reduces resonance and makes the shaft 35% more rigid.
Sony engineers have chosen an alloy called Duralumin which, when fabricated into a thin-walled, hollow tube.=, nevertheless retains exceptional strength. Finally, because of its high rigidity and low mass, the tonearm accepts a wide variety of cartridges, including the high compliance, high performance types.
Specifications
Turntable
Operation Type: Semi-automatic
Platter: 310 mm (12-1/4") aluminum-alloy diecast
Platter Weight: 1,1 kg (2lb 7 oz)
Motor: Linear torque BSL (Brushless and slotless) motor
Drive System: Direct-drive
Control System: Magnedisc servo, and Quartz lock control system
Speeds: 33-⅓ and 45 rpm
Starting Characteristics: Comes to nominal speed within a half revolution (33-⅓ rpm)
Speed Accuracy: >0,003%
Wow and Flutter: 0,025% (WRMS) ±0,04% (DIN-45507)
FG Direct Measurement: 0,02%
Signal-to-Noise Ratio: 78 dB (DIN-B)
Load Characteristics: 0,05% up to 150 g stylus force (at lead-in groove of a record)
Tonearm
Type: Straight Statically balanced
Pivot-to-stylus length: 216,5 mm (8-5/8")
Overhang: 16,5 mm
Tracking Error: +3°00'; -1°00'
Effective Mass (without cartridge): 8,98 g
Stylus Force Adjustment Range: 0 - 3 g
General Section
Power Requirements: 120 V AC 60 Hz
Power Consumption: 8 W
Dimensions (W x H x D): 430 x 105 x 355 mm (17" x 4-1/4" x 14")
Weight: approx 6,3 kg (13 lbs 14 oz)
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