Technics SP-12
¥ 45,800 (around 1974)
Commentary
Direct drive turntable with independent rotating parts of SL-1200.
An electronically controlled ultra-low-speed DC motor is used in the drive section to eliminate the effects of power supply voltage and frequency fluctuations and to obtain stable rotation.
310 kg ・ cm due to large starting torque2The turntable is rotated at a constant speed of 1/2 rotation, and quick start is also possible by stopping the turntable by hand and starting it instantly.
Excellent performance is obtained by direct drive system without any reduction mechanism such as belt and idler.
A strobe is engraved on the edge of 45 ° inclination, and the rotation speed can be finely adjusted accurately by illumination of the illuminator.
Speed switching is electronic, and fine adjustment is possible within 10% range by 33 1/3 and 45 rpm alone.
A large dynamically balanced turntable 33 cm in diameter and 1.75 kg in weight has been adopted.
Model Rating
| Type | Direct drive turntable |
| Turntable | 33 cm Aluminum Die-cast, 1.75 kg |
| Inertial mass | 310 kg / cm2 |
| Motor | Ultra-low speed electronic commutator motor |
| Drive system | Direct drive |
| Number of revolutions | 33 1/3, 45 rpm |
| Rotational speed switching system | Electronic control system |
| Rotational speed adjustment range | ± 5%, each rotation speed independently adjustable |
| Wow flutter | 0.03%(W.R.M.S.) |
| Signal-to-noise ratio | 60dB(IEC-B) 70dB(DIN45539B) |
| Bootup | Normal operation at 1/2 rotation (33 1/3rpm) |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 4W |
| External dimensions | Width 339x Height 135x Depth 364 mm |
| Weight | 6.3kg |