Due to the widespread use of CDs, turntable systems disappeared briefly from the market, but their warm sound quality is bringing them back.
Technics SL-1200G Direct Drive Turntable.
The direct-drive turntable invented by Technics is still highly acclaimed by audiophiles and DJs in the form of the SL-1200 Series, and there have been many requests to revive the turntable system. As such, Technics decided to develop a new system for Hi-Fi use. Technics provide an outline of their intent in this development.
Direct-drive is generally considered to be for DJ use, and belt drive is for Hi-Fi use. In the 1970s, when Technics invented direct-drive turntables, their performance and reliability were first recognised by broadcast stations. High acclaim was then received by audiophiles. The high-precision rotation and absence of S/N ratio degradation were particularly attractive to these users. The high torque and reliability of direct-drive were recognised by DJs, and direct-drive turntables became the standard in the club scene.
When developing a direct-drive motor, considerable capital investment is required for large-scale production equipment. In contrast, belt drives can be made with a little cost. Also, compared with direct-drive, belt drive was designed with the latest technology. The view remains that direct-drive is for DJ use and belt drive is for Hi-Fi use. Originally, direct-drive offered superior sound quality. If Technics redesign the direct-drive motor and control circuitry, we will be able to create a turntable that is superior to other systems.
Technics was also a leader in incorporating innovations, such as vibration-damping materials, cabinet construction, and insulators. Having inherited the DNA of Technics, they do not wish to merely make a replica of the SL-1200.
In other words, their intent in this development is to redefine the direct-drive turntable reference.
Coreless Direct Drive Motor
Conventional analogue turntables have problems with degradation in sound quality caused by factors such as minute speed vibration during rotation and rotation irregularity called "cogging." In the SL-1200G, the use of a newly developed coreless direct-drive motor with no iron core eliminates cogging. Also, the twin-rotor construction reduces the bearing load while maintaining high torque and also reduces minute vibration during rotation. These factors enable reproduction of the warm, exquisitely detailed sound etched on analogue records.
High-precision Motor Control Technology
The application of motor control technology developed for Blu-ray devices and switching the drive mode depending on the operational status of the motor achieve a high-starting torque and high-speed stability.
Three-layered Turntable Platter
The turntable has a three-layered construction with a rigidly combined brass and aluminium die-cast platter. With a deadening rubber covering its entire rear surface to eliminate unnecessary resonance, thereby achieving high rigidity and vibration damping. This delivers smooth rotational stability and inertial mass surpassing the SP-10MK2, the direct-drive turntable standard used by broadcast stations worldwide, as well as having more than twice the inertial mass of the SL-1200MK5.
Concept of Three-layered Turntable Platter
High-level Balance Adjustment
When the weight distribution of the turntable is uneven, excess vibration or noise occurs during rotation, which causes degradation in sound quality. Therefore, the balance of the turntable is adjusted at the factory by using specialized high-precision balance adjustment equipment for each and every item after the turntable is assembled. Turntables that have undergone adjustment are labelled with a sticker reading "BALANCED" to indicate that adjustment has been done.
The tonearm employs lightweight magnesium which has a high damping effect, with cold drawing improving the characteristics of the material and achieving the high-precision required. In addition, high initial-motion sensitivity is attained by employing the traditional Technics gimbal suspension construction with horizontal rotation axis and the vertical rotation axis intersecting at a single central point, as well as high-precision bearings using a cut-processed housing.
Four-layered Cabinet Construction
A hairline-processed, 10-mm-thick top panel of immaculate aluminium has been added to the previous three-layered construction of aluminium die-cast, BMC, and heavyweight-class rubber on the SL-1200MK5. This four-layered construction combines high rigidity with a high-quality finish and feel.
The use of brass-milled, gold-plated phono terminals and ground terminals prevent degradation in sound quality while enabling the easy attaching and detaching of cables. Also the use of metal shielding construction inside the case reduces the effects of external noise.
|type||Direct Drive Manual Turntable|
|Turntable Speeds||33-1/3, 45 and 78 rpm|
|Adjust Range||±8 %, ±16 %|
|Starting Torque||3.3 kg-cm|
|Build-up Characteristics||0.7 s. from Standstill to 33-1/3 rpm|
|Wow And Flutter||0.025 % W.R.M.S. (JIS C5521)|
|Rumble||78 dB (IEC 98A weighted)|
|Turntable Platter||Brass and aluminium die-cast combined
Weight: Approx. 3.6 kg (including a rubber mat)
|Type||Universal Static Balance|
|Effective Length||230 mm|
|Tracking Error Angle||Within 2° 32'(at the outer groove of 30 cm (12"") record)
Within 0° 32'(at the inner groove of 30 cm (12"") record)
|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 the auxiliary weight)
5.6 to 12.0 g
14.3 to 20.7 g (including the head shell)
(With small auxiliary weight)
10.0 to 16.4 g
18.7 to 25.1 g (including the head shell)
(With large auxiliary weight)
14.3 to 19.8 g
23.0 to 28.5 g (including headshell)
|Cartridge Mounting Dimension||JIS 12.7 mm Interval|
|Head Shell Terminal Lug||1.2 mm φ 4-pin Terminal Lug|
|audio output||PHONO (Pin Jack), EARTH TERMINAL|
|Power Supply||AC 110 - 240 V, 50 / 60 Hz|
|Power Consumption||14 W Approx. 0.2 W (standby)|
|Dimensions (W x H x D)||453 x 173 x 372 mm|
|Weight||Approx. 18 kg|