Technics SL-D4
¥ 39,800 (released in 1983)
Commentary
A jacket size D. D. player with full automatic operation.
All operations such as arm up/down, forward / backward control, etc. can be performed only with the front panel buttons with the dust cover closed.
The upper cabinet is equipped with a linear tracking arm, and the tracking error angle is within ± 0.1% and the inside force is almost 0, realizing high-precision arm travel by microcomputer control.
The arm bearing structure of the gimbal suspension system is adopted, and the same high precision in all directions is obtained by the 4-point support by the pivot and ball bearing, and the stable tracing performance is realized by the dynamic balance system arm.
Highly accurate rotational performance is achieved by adopting a unique integrated structure D. D. that integrates the motor rotor and turntable, and an all-around detection F. G.
Equipped with a plug-in connector type MM cartridge.
The lower cabinet and bottom base are all composed of TNRC to improve vibration isolation performance.
Model Rating
| Type | DD full auto-player system |
| <Turntable portion> | |
| Drive system | Direct drive |
| Control system | FG servocontrol |
| Turntable | 30 cm Aluminum Die-cast |
| Number of revolutions | 33 1/3, 45 rpm |
| Wow flutter | 0.025%W.R.M.S(JIS C5521) |
| Signal-to-noise ratio | 78 dB (DIN-B, IEC98A weighted) |
| Tone Arm Section | |
| Tracking error angle | Within ± 0.1 ° |
| Arm resonance frequency | 12Hz |
| Cartridge Section | |
| Format | Plug In Connector MM Type Cartridge |
| Dead weight | 6g |
| Exchange needle | EPS-27CS(¥3,000) |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 7.5W |
| External dimensions | Width 315x Height 88x Depth 315 mm |
| Weight | 3.7kg |