SONY PS-4350
¥ 47,800 (around 1974)
Commentary
A belt drive player system that uses SBMC.
Using a newly developed low-speed servo motor, vibration and noise are reduced by low-speed rotation.
In addition, since the rotation is controlled by servo, uneven rotation is reduced.
A sucker type insulation mat is used to suppress resonance by making the record adhere to the turntable.
This mat has a small hole in the center of the suction cup, and the viscous resistance of the air passing through this hole reduces unnecessary longitudinal vibration and dampens resonance.
As a result, the signal in the longitudinal direction of the groove of the record is related to the stereo effect, so the effect of improving the orientation is obtained, and the modulation noise is removed to suppress the turbidity of the sound.
SBMC, a new material developed by Sony engineers, is used for the cabinet and turntable.
This material is a thermosetting reinforced resin that combines polyester resin with calcium carbonate and glass fiber. It has a shrinkage rate of 2 to 3/10,000, which is almost equal to 0. Therefore, it is difficult to be deformed after shaping and high-precision processing is possible. In addition, since the specific gravity can be freely adjusted, the specific gravity can be set to obtain the optimum moment of inertia.
In addition, since the internal loss is larger than that of aluminum, resonance is difficult, and howling and S/N are improved.
Equipped with independent pitch control for each of 2 speeds of 33 1/3 and 45 rpm, precise speed adjustment is possible.
Universal type static balanced arm with replaceable shell is adopted.
In addition, an inside for scan seller is built into the body, and it is equipped with an overhang checker.
The cartridge tilt adjustment mechanism allows adjustment so that the needle tip is perpendicular to the record.
The cartridge is equipped with a MM type cartridge in which a small circular magnet is placed in a V-shape.
0.5 mil diamond needle is used.
Semi-auto system capable of auto cut and Oatley turn.
Uses a large rubber insulator.
Model Rating
| Type | Record player system |
| <Turntable portion> | |
| Turntable | 34 cmSMBC, 1.0 kg |
| Motor | DC servo motor |
| Drive system | Belt drive |
| Number of revolutions | 33 1/3, 45 rpm |
| Speed adjustment range | + / - 4 per cent |
| Start-up characteristic | Within 1/2 Rotation (33 1/3rpm) |
| Wow flutter | 0.06% WRMS or less |
| Signal-to-noise ratio | 65 dB or more |
| Tone Arm Section | |
| Tone arm | Static balanced universal tone arm |
| Effective length | 237mm |
| Total Length | 314mm |
| Overhang | 15mm |
| Tracking error angle | + 2 ° 30', -1 ° 20' |
| Offset Angle | 21 ゜ 30' |
| Needle pressure adjustment range | 0 ~ 3g |
| Shell Weight | 14.5g |
| Usable cartridge weight | 4g ~ 14g |
| Cartridge tilt adjustment range | ± 12 ° |
| Cartridge Section | |
| Cartridge | MM Type |
| Frequency characteristic | 20 Hz to 20 kHz |
| Separation | 18dB(1kHz) |
| Output voltage | 2.5 mv (1 khz, 5cm/s) |
| Optimum load impedance | 50k Ω |
| Compliance | 10x10-6Cm / dyne (vertical, horizontal) |
| Needle pressure (optimum needle pressure) | 1.5g ~ 2.5g (2g) |
| Needle | 0.5 mil diamond needle |
| Weight | 5.5g ± 0.5 |
| Exchange needle | ND-134G |
| <General> | |
| Semiconductor used | IC : 1 Transistor : 1 Diode : 4 pcs |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 6W |
| External dimensions | Width 477x Height 175x Depth 420 mm |
| Weight | 8.2kg |
| Attachment | 45 Rotation Adapter |
| Sold Separately | Sony Oil OL-2KA Cartridge XL35, XL-45 |