The motor that forms the heart of the direct drive turntable is based on the coreless direct drive motor that was developed for the SL-1200G launched in 2016, and further improved. The double coil twin rotor-type coreless direct drive motor that was newly developed for this purpose had coils on both sides for 12-pole, 18-coil drive, with high enough torque to drive the heavyweight-class platter (approximately 7.9-kg). Offsetting the coils on both sides 60 degrees improved the rigidity of the substrate, suppressing fine vibrations and reducing self-inductance. These improvements achieved stable rotation of 0.015% wow and flutter or less, which is considered to be the measurement limit. Also, the thrust bearings supporting the heavyweight-class platter use a special engineering plastic to provide both high rigidity and reliability.
Suppressing Unwanted Motor Vibration
The motor that was developed for the SL-1200G served as the platform for the direct drive motor. The double coil, reinforced thrust bearings, and a chassis with increased rigidity achieved a stabilised motor with low centre of gravity. By positioning two stainless steel weights with high rigidity and high specific gravity at the bottom of the chassis, the rigidity and low centre of gravity are maintained. These thorough measures to prevent unwanted vibration help to achieve overwhelming rotary precision and improve S/N.
Heavyweight-class Turntable Platter
The turntable platter positions tungsten weights, which have an extremely high specific weight and are difficult to process, on the outer periphery of a 10-mm-thick brass weight. The brass weight is laminated onto the aluminium die-cast, giving the platter a total weight of approximately 7.9 kg and an inertial mass of approximately 1 ton･cm. A deadening rubber for eliminating unwanted vibration is also attached to the rear surface to form a 3-layer construction and achieve high rigidity and excellent vibration damping characteristics.
Separate Control Unit
The control unit is separated from the main unit to suppress the effects of unwanted noise on the main unit. In order to achieve a power supply circuit that provides good regulation for high torque, a switching power supply is used. To reduce the noise reaching the pickup, the switching power supply is equipped with a unique technology that provides a voltage supply with minimal noise by a newly developed “unwanted noise reduction circuit”. Also, to minimise the noise even during communication, a highly reliable system that resists the effects of external noise is used for communication between the main unit and the control unit. These thorough noise-reduction measures achieve the world’s highest-level
Minute Adjustment and Indication of Rotations
This turntable supports not only LP (33 1/3 rpm) and EP (45 rpm) analogue records, but also SP (78 rpm). Rotation (rpm) can also be set down to two decimal places (maximum ±16%) from the control unit. The OLED display is also capable of displaying rotation with accuracy down to two decimal places, so the user can both hear and see extremely precise rotation.
To enable the tonearm to precisely track the record’s rotation, Technics has traditionally used the static balance, S-type universal tonearm with a lightweight, high damping magnesium tonearm pipe. The gimbal suspension construction tonearm uses high-precision bearings. Highly skilled Japanese craftsmen handle all assembly and adjustment to achieve a high initial-motion sensitivity to precisely trace the grooves cut into the records. OFC is used for internal wiring, so the music signal relayed from the cartridge is not dampened and the musical energy cut into the record is not lost, thereby producing highly vivid sounds.
- Drive Method
- Direct Drive
- Brushless DC motor
- Turntable Speeds
- 33 1/3, 45, 78 rpm
- Adjust Range
- ±16 %
- Starting Torque
- 0.39 N・m / 4.0 kg･cm (3.47 lb-in)
- Wow And Flutter
- 0.015 % W.R.M.S.
- Turntable Platter
- Brass and aluminium diecast combined
Diameter : 323 mm (12-23/32″)
Weight : Approx. 7.9 kg (17.5 lbs) (including turntable mat)
- Universal Static Balance
- Effective Length
- From the tonearm pivot to the stylus : 254mm (10″)
From the tonearm pivot to the spindle : 239mm (9-13/32″)
- 15 mm (19/32 inch)
- Tracking Error Angle
- Within 1° 48′ (at the outer groove of 30 cm (12″) record)
Within 0° 30′ (at the inner groove of 30 cm (12″) record)
- Offset Angle
- Arm Height Adjustment Range
- 0 – 15 mm
- Stylus Pressure Adjustment Range
- 0 – 4 g (Direct Reading)
- Applicable Cartridge Weight Range (including Headshell)
- 15.9 – 19.7 g (without auxiliary weight)
18.8 – 23.6 g (with small auxiliary weight)
22.5 – 26.3 g (with middle auxiliary weight)
26.0 – 31.0 g (with large auxiliary weight)
When William Voss, Business Development Manager for Technics in the United States, called and asked if I wanted to hear the company’s new SL-1000R, I was all ears. For years, I’ve had to listen to various friends effuse about the merits of direct as opposed to belt drive. Once you’ve heard direct drive, they would announce, you’ll never go back to belt. They were driven, you could say, to tout the virtues of direct drive. Some are using the legendary Technics SP-10 Mk 3, which they have heavily modified, partly by embedding the original drive system in a new and massive plinth. One talented audio engineer who has taken this approach is Bill Thalmann of Music Technology, who lives near me in northern Virginia.
Given the intense resurgence of interest in all things vinyl, it was only a matter of time, I suppose, before Technics itself took a stab at reinventing its product from the ground up. Indeed, Technics, under the leadership of Michiko Ogawa, who also happens to be a fine pianist (if you check out some of her YouTube videos you’ll see what I’m talking about), appears to be aiming to make something of a splash with a variety of new high-end products. So I was most curious to hear the latest and greatest from the company, which has now produced a flagship version of its turntable with its own proprietary tonearm and outboard power supply. I should note that this is not the finished version of the ’table, but Technics is close enough to the final one that I was eager to listen to it as soon as possible. READ MORE