https://www.teac-audio.eu/en/irajax/en/articles/teac-unveils-tn-4d-turntable-employing-a-new-ultra-stable-direct-drive-motor-and-saec-designed-knife-edge-tonearm-bearings-156590.html/cHJvamVjdC5jb21tb24udXJsU2hvcnRlbmVyOw==

TEAC unveils TN-4D turntable, employing a new ultra-stable direct-drive motor and SAEC-designed knife-edge tonearm bearings

Press Release dated: 7 May 2019

The TN-4D is a direct-drive, analogue turntable with an elegant, low-profile design, made possible by the use of a newly-developed brushless DC servo motor.

This motor (with feedback control system) achieves crystal-locked speed stability and smoother rotation while also eliminating cogging*. This low-profile motor also allowed us to design a plinth that’s extraordinarily sleek and stylish compared to that of most other direct drive turntables. The new tonearm employs knife-edge, pivot-point bearings, developed in collaboration with SAEC Corporation, a world-famous, high-end tonearm manufacturer. The result is an insightful, high-resolution sound quality that tonearms with conventional bearings can’t match. Partnering it is a carefully designed PHONO EQ amplifier that allows you to directly connect the turntable to the line-level inputs of your existing hi-fi system. A high quality NJM8080 op-amp, specially designed for hi-fi applications by New Japan Radio Corporation, is employed to convey the finest of musical detail. Additionally, a USB port on the back panel allows you to digitally archive your vinyl collection via your PC/Mac.

To extract the music from your vinyl, the TN-4D comes with a highly-regarded Oyster MM cartridge from SUMIKO – a legendary American cartridge manufacturer. Noted for  its innate musicality, the cartridge comes pre-installed on the headshell at the factory, allowing near ‘plug and play’ operation. The S-shaped tonearm, meanwhile, allows for quick cartridge/headshell swaps, so users can alter the sound quality by experimenting with different cartridges, if the desire takes them.

The TN-4D is an analogue turntable that achieves highly accurate rotational speeds and is very distinctive, for a direct-drive design, thanks to its sleek and stylish aesthetics.

What is Cogging? 

Cogging is a phenomenon in which the periodic attraction of the armature and rotor inside the motor is dependent on the rotation angle, resulting in a fine pulsing. For example, if you turn the axle of a motor with your fingers, you'll feel the rotation occurring in steps. This phenomenon is known as cogging.

In order to eliminate cogging on a direct-drive turntable, a motor needs to have large numbers of poles, along with complex circuits and a mechanism to achieve smooth rotation. As a result, most turntable direct-drive units are relatively large, which is why the resulting turntables are so bulky.

Features 

  • Direct-drive analogue turntable
  • Crystal-locked speed stability, thanks to a new brushless DC motor with feedback control
  • Die-cast aluminium platter
  • Knife-edge, pivot-point tonearm base, designed by high-end tonearm manufacturer SAEC
  • Multi-layer piano black or natural walnut veneer finish
  • Built-in PHONO EQ amplifier for high-quality sound (PHONO/LINE switchable)
  • Audiophile-grade NJM8080 op-amp used in PHONO EQ stage
  • Digital recording on PC/Mac via USB digital audio output
  • 2-speed drive offering 33-1/3 and 45 rpm
  • Gold-plated oxidation-resistant output connectors 
  • Oyster MM cartridge by SUMIKO
  • Shock-absorbing insulating feet
  • GND terminal
  • RoHS compliant

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