Direct Drive Turntable System
The new standard model inheriting the technology of the SL-1200G, which was developed as a reference direct-drive turntable for the next generation
Coreless Direct-Drive Motor Achieving Stable Rotation
In 1970, Technics commercialized the world‘s first direct-drive turntable, and the system took the world by storm. Unlike belt-drive and other systems, direct-drive systems rotate the motor at low speed and directly drive the platter, thus providing numerous advantages, such as the almost complete absence of degradation in S/N ratio due to motor vibration and deceleration mechanisms, as well as high reliability over a long period time because of not requiring parts replacement.
And in 2016, Technics developed the twin-rotor, surface-facing, coreless direct-drive motor with rotor magnets placed on both sides, thereby eliminating the rotation irregularity of the motor, referred to as "cogging," which was a unique issue for direct-drive systems. This motor was adopted for the SL-1200G, which once again drew a significant response in the hi-fi market. The SL-1200GR inherits the same design philosophy with the new development of a single-rotor, surface-facing, coreless direct-drive motor, resulting in the elimination of cogging.
High-precision Motor Control for Ideal Rotation Conditions
The rotation control, which verifies and corrects the precision of the motor, uses the latest motor control technology cultivated in the development of Blu-ray disc devices, just as that used by the SL-1200G. Sine waves stored in ROM are used for the control waveforms at constant speed, and this achieves smoother and more stable rotation compared with using the simple sine wave generation with an external coil as in the conventional SL-1200MK5. In addition, the electrical circuitry has had tuning performed so that the newly developed motor of the SL-1200GR achieves maximum performance. The starting torque achieves 2.2 kg x cm with only a single rotor. The same startup time of 0.7 s (at 33 1/3 rpm) as the SL-1200G has been achieved.
Pursuing Rigidity and Vibration Damping Characteristics
The platter achieves high rigidity and vibration damping characteristics by using a two-layer construction with deadening rubber applied to the entire rear surface of the aluminium die-cast to eliminate the unnecessary resonance that is otherwise relayed to the record, thereby producing clear sound.
To increase the inertial mass and reduce vibration, the shape of the aluminium die-cast portion was optimized by simulation. At 2.5 kg (including the rubber mat), the SL-1200GR platter is 0.8 kg heavier than that of the previous SL-1200MK5. Also, the back surface of the platter has strengthening ribs added to improve rigidity. Increasing the surface area of contact with the deadening rubber achieves damping characteristics that are more than twice those of the SL-1200MK5.
Tonearm Achieving High Initial-Motion Sensitivity
The tonearm tracks the rotation ofthe record and enables reading with high precision, and the tonearm inherited by Technics is the traditionally used static-balance universal S-shaped tonearm, employing an aluminium pipe with excellent light weight and rigidity for the material of the tonearm pipe.
With its gimbal suspension construction, the tonearm bearing section uses a cut-processed housing that employs high-precision bearings, as in the SL-1200G. The high initial-motion sensitivity of 5 mg or less is achieved through manual assembly and adjustment by skilled Japanese artisans. This enables the grooves etched into the records to be accurately traced.
In addition, one type of auxiliary weight comes included, and the cartridge can be swapped with a variety of other cartridges to match the music genre or feeling. (Applicable cartridge weight when using the supplied auxiliary weight: 10 - 16.4 g (not including the supplied head shell))
Direct Drive Turntable System
- Direct Drive Manual Turntable
- Turntable Speeds
- 33-1/3, 45 and 78 r/min
- Adjust Range
- ±8 %, ±16 %
- Starting Torque
- 2.2 kg-cm
- Build-up Characteristics
- 0.7 s. from Standstill to 33-1/3 r/min
- Wow And Flutter
- 0.025 % W.R.M.S.
- 78 dB (IEC 98A weighted)
- Turntable Platter
- Aluminium diecast
Diameter : 332 mm
Weight : Approx. 2.5 kg (5.51 lb) (Including rubber sheet)
- Universal Static Balance
- Effective Length
- 230 mm (9-1/16")
- 15 mm (19/32")
- Tracking Error Angle
- Within 2° 32' (at the outer groove of 30 cm record)
Within 0° 32' (at the inner groove of 30 cm record)
- Offset Angle
- Arm-height Adjustment Range
- 0 - 6 mm
- Stylus Pressure Adjustment Range
- 0 - 4 g (Direct Reading)
- Head Shell Weight
- Approx. 7.6 g
- Applicable Cartridge Weight Range
- (without auxiliary weight)
5.6 - 12.0 g
14.3 - 20.7 g (including head shell)
(with auxiliary weight)
10.0 - 16.4 g
18.7 - 25.1 g (including head shell)
- Cartridge Mounting Dimension
- JIS 12.7 mm (1/2") interval
- Head Shell Terminal Lug
- 1.2 mmφ 4-pin terminal lug
- Audio Output
- PHONO (Pin Jack) x 1
EARTH TERMINAL x 1
- Power Supply
- AC 120 V, 60 Hz
- Power Consumption
- 11 W Approx.
0.2 W (Standby)
- Dimensions (W x H x D)
- 453 x 173 x 372 mm
(17-27/32 × 6-13/16 × 14-21/32 inch)
- Approx. 11.5 kg
- Turntable, Turntable sheet, Dust cover, EP record adaptor, Balance weight, Auxiliary weight, Head shell, Overhang gauge, Screw set for cartridge, PHONO cable, PHONO earth lead, AC power supply cord, Owner's Manual